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Mark Hamill made for quite the arresting presence at the “Brooklyn Nine-Nine” panel at San Diego Comic-Con on Thursday.

Or did he?

“Star Wars” actor Mark Hamill tweeted a photo of his “disguise” for the panel, sharing a picture of himself in a cap, sunglasses and a jacket emblazoned with a badge reading “Police Department City of New York.”

“Having LOADS of fun at #SDCC … This was my disguise at yesterday’s #Brooklyn99 panel,” Hamill wrote. “LOVED it & can’t wait for the new season!”

Also Read: Mark Hamill Hints He's at San Diego Comic-Con, Disguised as Himself

Hamill added the hashtags “#TheShowISinglehandedlySaved” and “#YoureWelcome,” apparent references to series star Terry Crews’ assertion that Hamill helped save the show after it was canceled by Fox earlier this year, and subsequently picked up by NBC.

After Fox gave the cop comedy the ax, Hamill was among those to express disappointment, tweeting, “Oh NOOOOOOOOO!!!!!!!!! … I’m SO not ready to say #ByeBye99. Be forewarned @FOXTV-when networks dump shows I love, I’m known for holding grudges a long, L-O-N-G time.”

Following NBC’s resurrection of the series, Crews tweeted, “@HamillHimself I want to personally THANK YOU Mark for using the power of the force to save Brooklyn Nine Nine!”

Also Read: NBC Teases 'Brooklyn Nine-Nine' Season 6 With Mashup of Old Fox Footage (Video)

Hamill’s cop-out seemed to contradict his tweet from Thursday, when the actor hinted that he would be at the convention in disguise, with a different mask for each of the four days of the convention.

The masks that Hamill shared Thursday stem from four of his beloved roles. The first was of his face from “Star Wars: The Last Jedi”; the second was of the Joker from “Batman: The Animated Series,” a voice-acting role Hamill has returned to again and again; the third from Luke Skywalker as he appeared in the original “Star Wars” in 1977; and the last was Skip, Hamill’s Yeti character from “The Regular Show.”

Of course, it’s possible too that Hamill isn’t at the convention at all, but merely yanking fans’ chains. He is known for being a Joker, after all.

Having LOADS of fun at #SDCC…
This was my disguise at yesterday’s #Brooklyn99 panel. LOVED it & can’t wait for the new season!#TheShowISinglehandedlySaved #YoureWelcome pic.twitter.com/61KJ2f6VRt

– Mark Hamill (@HamillHimself) July 20, 2018

19 Stars Who Went to Comic-Con in Disguise, From Ben Affleck to Lupita Nyong'o (Photos)

Since Comic-Con is a hotbed of superfans, stars like to go into stealth mode in order to experience the fun. See the celebrities who have walked in disguise at the annual fan fete in San Diego, California.
In 2011, Esquire magazine writer Chris Jones accompanied Justin Timberlake at Comic-Con dressed as beloved "Sesame Street" duo Bert and Ernie, respectively.
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While attending 2011's Comic-Con to promote "The Amazing Spider-Man," Andrew Garfield pulled a double-fake by dressing as... Spider-Man.
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Former "Doctor Who" star Matt Smith put on a Bart Simpson mask to walk the floor at the 2013 event.
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Bryan Cranston surprised his co-stars at a "Breaking Bad" panel in 2013 with a creepily realistic Walter White mask.
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Former Harry Potter star Daniel Radcliffe left his invisibility cloak at home and donned a Spider-Man costume to attend the 2014 Comic-Con.
In 2014, "Lord of the Rings" director Peter Jackson posted pics of himself on Facebook strolling through San Diego as an evil jester.
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Jack Black walked the floor of the 2014 event wearing a Stormtrooper mask but admitted that he didn't fool many people. "Everybody's just like, 'Jack Black, you in there?'" he told MTV News. "And I'm like 'No, it's not me. I don't know what you're talking about.'"
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Samuel L. Jackson mysteriously tweeted this bemasked shot of himself with his castmates from "Kingsman: The Secret Service" in 2014.
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According to science blogger Phil Plait, "Mythbusters" host Adam Savage built this elaborate costume for the 2014 event.
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Former "Hills" star Audrina Patridge went blue as the X-Men character Mystique at the 2014 convention.
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Simon Pegg put a "Star Wars" mask on top of his "Shaun of the Dead" outfit for the 2014 Comic-Con.
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"Game of Thrones" actress Maisie Williams went all out for the 2014 convention, putting on both a Spider-Man mask as well as a Guy Fawkes disguise.
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Marvel star Mark Ruffalo pulled on this creepy mask to wander Comic-Con in 2015.
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While there were plenty of fans who dressed as Jared Leto's green-haired Joker at the 2015 Comic-Con, the "Suicide Squad" star himself went undercover in a baboon mask. "He had no idea. :)" the star wrote in his Instagram caption.
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Josh Hutcherson even surprised his "Hunger Games" co-star Jennifer Lawrence with this old-man mask at the 2015 Comic-Con.
Big-screen Superman Henry Cavill put on a Guy Fawkes mask and walked the convention floor in 2016 -- and even fooled Will Smith and other stars of DC Comics' "Suicide Squad."

Also Read: Comic-Con 2016: Henry Cavill Fools Will Smith and ‘Superman’ Fans (Video)
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When she wasn't promoting "Black Panther" in Hall H, Lupita Nyong'o went running around the convention floor in a Pink Ranger outfit at Comic-Con 2017.
Twitter/Lupita Nyong'o
"Batman" star Ben Affleck avoided Batman questions in 2017 by walking around the convention floor in a Sesame Street shirt and a hideous green mask.
In 2018, Mark Hamill hid among fans on the convention floor disguised as a First Order stormtrooper. nd yes, he joked about Leia’s infamous “Aren’t you a little short for a stormtrooper?” line in his Instagram post.
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Celebrities avoid the mad crush by going undercover at the San Diego fan event

Since Comic-Con is a hotbed of superfans, stars like to go into stealth mode in order to experience the fun. See the celebrities who have walked in disguise at the annual fan fete in San Diego, California.

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