The cast of "Friends" had an on-air reunion on NBC's "Must See TV: An All-Star Tribute to James Burrows" Sunday night along with stars of other popular sitcoms to honor the legendary director, according to US Weekly.

"Friends" cast members including Jennifer Aniston, Matt LeBlanc, Lisa Kudrow, Courteney Cox and David Schwimmer took the stage after being introduced by Matthew Perry in a pre-recorded video. Perry could not make it to the reunion as he's busy rehearsing for his London play, as HNGN previously reported.

When asked about their favorite episode, Cox said hers was "The One With The Blackout" from the first season of the hit sitcom, which featured Chandler getting stuck in an ATM vestibule and a cat jumping on Ross before he confesses his feelings towards Rachel, according to People.

Schwimmer recalled how Burrows said he would let him know when to stop acting like the cat was attacking him but the director did not remain good to his word and Schimmer felt like the scene went on forever.

Aniston said her favorite episode was "when we would have the flashbacks. I always loved when we would flashback to Fat Monica and Rachel Pre-Nosejob and Ross with his Afro."

Host Andy Cohen then brought up a rumor and asked the cast whether or not it was actually true. "Did you all sign contracts saying that you wouldn't sleep with each other?" asked Cohen.

"David, say something," Kudrow nudged Schwimmer, followed by an awkward silence. "Well, that was broken," Schwimmer quipped before Kudrow confessed that there was no such contract, according to Daily Mail.

Kudrow said she was never asked to agree to such contract terms.

Watch the full "Friends" reunion below:

Friends Reunion - James Burrows Tribute from Camille Fung on Vimeo.