Must See TV: An All-Star Tribute to James Burrows premieres Sunday (9/8c, NBC), honoring the sitcom director who's helmed 1,000 episodes of television over his career, including Cheers, Friends, The Big Bang Theory and every episode of Will & Grace.

Stars from all those shows and more make appearances in this hilarious sneak peek of the special's opening sketch. The Big Bang Theory's Jim Parsons enlists Will & Grace's Sean Hayes to help him secure appearances from Burrows' friends. It's great.

James Burrows' greatest hits: all the iconic comedies he's directed

Check it out: