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‘The Big Bang Theory’ Star Mayim Bialik Teases Mark Hamill Appearance: ‘I Peed My Pants’ (Photo)

”Star Wars“ icon will appear on season finale of CBS sitcom in May

When Mark Hamill showed up on the set of “The Big Bang Theory,” star Mayim Bialik sort of lost her mind — as well as control over her bodily functions.

“TBBT” star Bialik posted a teaser photo of Hamill’s visit to the set via Instagram on Wednesday, by way of a photo of herself and costar Kaley Cuoco, with stunned looks on their faces, as the “Star Wars” icon stood nonchalantly in the background.

“Literally what happened when @normancook and I met @hamillhimself . Also I peed my pants,” Bialik wrote. “Kaley this picture is amazing lol.”

Apparently, the feeling was mutual, as Hamill tweeted Bialik’s message, along with praise for the CBS sitcom.

“As a lifelong nerd-I’m thrilled to be even a small part of @bigbangtheory- a show that’s had #StarWars in its’ DNA from Day 1,” Hamill wrote. “I had the same reaction meeting these 2 lovelies as @missmayim (fortunately for me I was wearing my #ESB #BactaBriefs at the time)????”

CBS announced Monday that Hamill would be among the guests featured on the Season 11 finale of “The Big Bang Theory,” which will feature the wedding of Amy (Bialik) and Sheldon (Jim Parsons).

Along with Hamill, the episode will also feature Kathy Bates, magician Teller and Jerry O’Connell, among other special guests.

The season finale of “The Big Bang Theory” will air Thursday, May 10 at 8 p.m. Until then, see Bialik experience a disturbance in the Force below.