Wil Wheaton (Himself)
Wil Wheaton didn’t have to do much preparation work for his role on TBBT. He was cast to play himself, albeit a slightly exaggerated version of his real-life persona. He appears in the third season and clashes with Sheldon almost instantly. Who wouldn’t?
Over the course of the following seasons, the two learn to bury the hatchet and, against all odds, actually become good friends. One of their most hysterical interactions is when Sheldon requests Patrick Stewart’s phone number from Wil to hire him as his acting coach. He denies the request but ends up landing the role Sheldon was preparing for.