As Sheldon (Jim Parsons) and Amy (Mayim Bialik) prepare to walk down the aisle on the upcoming season 11 finale of "The Big Bang Theory," several big names are RSVP-ing to join the episode's already star-studded guest list.

The most famous folks who've just signed on for guest appearances are Mark Hamill (the titular hero of "Star Wars: The Last Jedi") and Kathy Bates (who's worked with "Big Bang" creator Chuck Lorre on "Two and a Half Men" and "Disjointed"). The stars' roles are remaining undisclosed for now.

According to The Hollywood Reporter, it's unclear if Hamill will play himself, but considering how big of a "Star Wars" fan Sheldon is, it would be hard to pass off Luke Skywalker as anyone else. Then again, he could be portraying a lookalike, with a winking reference to the actor's "Star Wars" connection. Fans will have to wait and see.

In other casting news, the wedding episode will feature several other "TBBT" newcomers, including comedian Lauren Lapkus and magician Teller (one half of duo Penn & Teller), whose roles have not been revealed yet. And Jerry O'Connell was recently cast as Sheldon's older brother, Georgie.

Here's the rest of the guest list, per THR, full of returning favorites: John Ross Bowie (as frenemy Barry Kripke); Courtney Henggeler (Sheldon's sister, Missy); previously announced Laurie Metcalf (Sheldon's mom, Mary); Brian Posehn (Bert); and Wil Wheaton (himself).

Fans are invited to watch the nuptials unfold when "The Big Bang Theory" season finale airs on May 10 on CBS.

[via: The Hollywood Reporter]