Sean Hayes, Debra Messing, Smash
Credit: Francis Specker/Landov

It's Grace and Jack, together again! Will & Grace star Sean Hayes just announced via Twitter that he'll be joining his former co-star, Debra Messing, on Smash this season. "I'm very excited to be guest-starring in a multi-episode arc on @NBCSmash this season," Hayes wrote. "Back to Broadway!" The actor is on board to star as Terrence Falls, "a comedic television and film star who is making his Broadway debut in the musical Liaisons, [who] becomes a major thorn in the side for Ivy Lynn," TVLine reports. Sounds hilarious—we hope he has a ton of air time with Messing!

Plus, see Smash stars as Marilyn!