Actor James Earl Jones attends the 2013 Inclusion In The Arts' Champion Of Diversity Award presentation on July 9, 2013 in New York City

Actor James Earl Jones attends the 2013 Inclusion In The Arts’ Champion Of Diversity Award presentation on July 9, 2013 in New York City

*James Earl Jones is set to make a guest appearance on TV’s No. 1 comedy.

The actor and his “Star Wars” co-star Carrie Fisher will both cameo as themselves in an upcoming episode of “The Big Bang Theory,” reports TVLIne.com.

The pair — who played Darth Vader and played Princess Leia in “Star Wars,” respectively — will cross paths with Sheldon (Jim Parsons).

“For the first time, Sheldon and the guys are locked out of Comic-Con tickets and they don’t get in,” showrunner Steve Molaro tells TV Guide. “Leonard [Johnny Galecki], Wolowitz [Simon Helberg] and Koothrappali [Kunal Nayyar] are going to get scalped passes. Sheldon’s solution is he is going to start his own comic book convention, he just needs one great panelist to make it happen. He realizes, through Twitter, where James Earl Jones is having sushi in Studio City and is going to confront him personally.”

As for Fisher, Molaro would only tease, “She’s got a very small, very funny, very weird part.”

“The Big Bang Theory” airs Thursdays at 8/7c on CBS.