Star Wars Weekends is now less than a month away, and Walt Disney World has announced the official lineup of celebrity guests, including first-timers Mark Hamill and — John Ratzenberger?

You read that correctly. A few years before "Cheers," Ratzenberger appeared in a minor role in "The Empire Strikes Back" as Major Bren Derlin during the battle on the ice planet Hoth.

Ratzenberger is no stranger to Disney fans. His voice can be heard in every Pixar feature film to date, most notably as Hamm the piggy bank in the "Toy Story" series.

Here is the complete celebrity guest lineup for Star Wars Weekends 2014, as announced Wednesday by Disney Parks Blog. Disney noted the lineup is subject to change.

Weekend I: May 16-18

  • Ahmed Best: Jar Jar Binks
  • Peter Mayhew: Chewbacca
  • Vanessa Marshall: Hera Syndulla (Star Wars Rebels)

Weekend II: May 23-25

  • Warwick Davis: Wicket W. Warrick (Return of the Jedi); Wald (Phantom Menace)
  • Jeremy Bulloch: Boba Fett; Capt. Jeremoch Colton (Revenge of the Sith)
  • Tiya Sircar: Sabine Wren (Star Wars Rebels)

Weekend III: May 30-June 1

  • Ray Park: Darth Maul
  • John Ratzenberger: Major Bren Derlin (Empire Strikes Back)
  • Taylor Gray: Ezra Bridger (Star Wars Rebels)

Weekend IV: June 6-8

  • Mark Hamill: Luke Skywalker; Darth Bane (Star Wars: The Clone Wars)
  • Ray Park: Darth Maul
  • Billy Dee Williams: Lando Calrissian
  • Taylor Gray: Ezra Bridger (Star Wars Rebels)

Weekend V: June 13-15

  • Dee Bradley Baker: Captain Rex/the Clones, Bossk and several additional characters (Clone Wars)
  • Cat Taber: Padmé Amidala and several additional characters (Clone Wars)
  • Tom Kane: Yoda, narrator and several additional characters (Clone Wars)
  • Matt Lanter: Anakin Skywalker and several additional characters (Clone Wars)
  • Steve Blum: Zeb Orrelios (Star Wars Rebels)