Go Behind the Scenes of the 'Big Bang Theory' Star-Studded Finale (PHOTOS)

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Kaley Cuoco gathers her castmates for a nice group selfie.

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Cuoco, Johnny Galecki, and Jim Parsons are in stealth mode as they sneak a photo from the wedding (note Parsons’ tux collar).

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The cast at their pre-filming table read.

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Magician and guest star Teller poses for a black-and-white photo with Cuoco.

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Mayim Bialik shares a photo of Amy’s wedding shoes.

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Bazinga! Jim Parson shows off his brightly-colored socks which totally fit Sheldon as wedding attire.

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John Ross Bowie catches this candid moment during a script read-through with the finale cast.

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We can’t decide who would be happier to meet Mark Hamill, Raj or Kunal Nayyar?

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Lauren Lapkus’s Denise makes an appearance, posing with Kevin Sussman on set.

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Kevin Sussman and Simon Helberg are caught up in the excitement of it all.

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Sussman captures guest stars Wil Wheaton, Brian Posehn. and John Ross Bowie with Kunal Nayyar. “The fellas getting pumped to tape the season finale,” Sussman writes.

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Sussman, Bowie, Wheaton, and Posehn pose for more backstage shenanigans.

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Co-stars and on-screen couple Parsons and Bialik share a sweet mirror selfie, which Bialik captions, “It’s like you’re my mirror @therealjimparsons.”

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Former Stand By Me co-stars Jerry O’Connell and Wil Wheaton couldn’t look happier during rehearsals.

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Most of the cast and guest stars take a moment to celebrate Season 11.

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Wheaton and Nayyar are wedding-ready in debonair suits.

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May is almost here and that means that The Big Bang Theory Season 11 finale is just around the corner.

Since it was announced that the finale would feature Amy (Mayim Bialik) and Sheldon's (Jim Parsons) wedding, the list of guest stars has been building. From Star Wars' Mark Hamill to the incomparable Kathy Bates, plenty of fan favorites are making their way to the CBS soundstage.

'Big Bang Theory' Season 11 Finale: CBS Reveals All of the Big-Name Guest StarsSee Also

'Big Bang Theory' Season 11 Finale: CBS Reveals All of the Big-Name Guest Stars

Kathy Bates, Laurie Metcalf, Mark Hamill and more make the list.

But you don't have to wait until the episode airs to get a glimpse at all of the A-list fun! The cast has been posting up a storm with photos from the finale's filming. Click through the gallery above for some exciting behind-the-scenes photos!

The Big Bang Theory, Season 11 Finale, Thursday, May 10, 8/7c, CBS