“Friends” saw plenty of guest stars like Brad Pitt, Charlie Sheen and Sean Penn — but not all of them always behaved well on set.

Lisa Kudrow was on “Watch What Happens Live” on Wednesday to promote the romantic comedy “Table 19” and the TLC series “Who Do You Think You Are?” when she dished to host Andy Cohen about the worst behavior by a guest star on the series.

“The worst behavior just off the top of my head? I rehearsed without makeup most of the week and then on show night I’m in hair and makeup and I was told, ‘Oh wow, now you’re’–can I say it? ‘Now you’re f–kable,” Kudrow told Cohen and fellow guest Jennifer Beals. “That’s bad behavior, I say.”

See Video: Lisa Kudrow, Courteney Cox Reunite for 'Friends' Trivia Match

“Did you retaliate?” Beals asked.

“I told Matt LeBlanc,” Kudrow laughed. “He’s like a big brother.”

Cohen tried to grill Kudrow on which guest star it might’ve been but the actress would not budge — however, she slyly confirmed it was not Sheen.

See Photo: 'Friends' Cast Reunites, Bonds With 'Big Bang Theory' Stars

Kudrow recently appeared on the “Today” show and told the hosts that unfortunately, there will be no “Friends” revival like the “Will & Grace” reunion that’s happening on NBC.

“I don’t see it happening. It would be fun, but what would it be about? Think about it.” Kudrow added. “The thing we liked best about the show was that they were 20-somethings and they were their own family. Now, they all have families, so what are we going to watch?”

Watch her interview below.

75 Eye-Popping Portraits From TheWrap's Sundance Studio (Exclusive Photos)

"The D Train" star James Marsden, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Z for Zachariah" star Chris Pine, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Z for Zachariah" star Margot Robbie, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"52: The Search for the Loneliest Whale in the World" producer Adrian Grenier, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"James White" star Christopher Abbott, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"James White" star Scott "Kid Cudi" Mescudi, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"James White" and "Stockholm, Pennsylvania" star Cynthia Nixon, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Nasty Baby" stars Alia Shawkat (l) and Kristen Wiig (r) with director Sebastian Silva, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"James White" director Josh Mond, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Misery Loves Comedy" star Lisa Kudrow, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The End of the Tour" star Mamie Gummer, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Misery Loves Comedy" star Kevin Smith, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Misery Loves Comedy" stars Kevin Smith and Kevin Pollack, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Nasty Baby" star Alia Shawkat, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Stockholm, Pennsylvania" star Jason Isaacs, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Stockholm, Pennsylvania" stars Jason Isaacs, David Warshofsky, Cynthia Nixon, Saoirse Ronan (back row, l-r)and Hana Hayse, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Stockholm, Pennsylvania" star Saoirse Ronan, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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YouTube star Flula, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The D Train" star Jeffrey Tambor, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The D Train" star Kathryn Hahn, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The D Train" star Jack Black photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The End of the Tour" star Jason Segel and director James Ponsoldt, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The End of the Tour" star Jason Segel, director James Ponsoldt (back row, l-r), Mickey Sumner and Mamie Gummer (front row, l-r), photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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YouTube star Olga Kay, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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YouTube star Olga Kay, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Resurrection of Jake the Snake Roberts" stars Scott Hall, Jake "The Snake" Roberts (back row, l-r), "Diamond" Dallas Page and director Steve Yu (front row, l-r), photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Viking" directors Sam and Ben Callis, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Animals" creators Mike Luciano and Phil Matarese, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"99 Homes" star Michael Shannon, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Z for Zachariah" star Chiwetel Ejiofor, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Z for Zachariah" star Margot Robbie, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Z for Zachariah" star Margot Robbie, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Z for Zachariah" star Chris Pine, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Bronze" star Melissa Rauch, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Bronze" star Haley Lu Richardson, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Bronze" star Gary Cole, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Slow West" stars Caren Pistorious and Kodi Smit-McPhee with director John Maclean (l-r), photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Sleeping With Other People" star Alison Brie and director Leslye Headland (l-r), photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Knock Knock" stars Lorenza Izzo and Keanu Reeves with director Eli Roth (l-r), photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Knock Knock" stars Lorenza Izzo and Keanu Reeves with director Eli Roth (l-r), photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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Ewan McGregor and Tye Sheridan, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Glassland" star Toni Collette, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Experimenter" stars Winona Ryder and Peter Sarsgaard, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Experimenter" stars Peter Sarsgaard and Winona Ryder, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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Producer Christine Vachon, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Overnight" star Jason Schwartzman, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"A Walk in the Woods" star Robert Redford, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Dope" star Blake Anderson, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Dope" star Kiersey Clemons, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Dope" stars Kiersey Clemons and Shameik Moore, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Dope" star Chanel Iman, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Advantageous" director Jennifer Phang and producer/actor Ken Jeong, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Last Days in the Desert" star Ewan McGregor, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Last Days in the Desert" actor Tye Sheridan, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Diary of a Teenage Girl" actor Alexander Skarsgard, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Diary of a Teenage Girl" star Bel Powley, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Kurt Cobain: Montage of Heck" director Brett Morgan, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Digging for Fire" actor Jake Johnson and director Joe Swanberg, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"People, Places, Things" star Jemaine Clement, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"People, Places, Things" director James C. Strouse, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Mississippi Grind" star Ben Mendelsohn, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Selma" director Ava DuVernay, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"The Hunting Ground" director Kirby Dick and producer Amy Ziering, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.
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"Cronies" executive producer Spike Lee and director Michael Larnell, photographed by Patrick Fraser at TheWrap's Kia photobooth during the 2015 Sundance Film Festival in Park City, Utah on Jan. 23, 2015.

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Chris Pine, Keanu Reeves, Kristin Wiig, Lisa Kudrow, Margot Robbie, Alexander Skarsgard, Jeffrey Tambor and Jack Black among stars shot by photographer Patrick Fraser

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