There will be a "Will & Grace" reunion on "Smash" next season when Sean Hayes joins the cast of Season 2.
According to NBC, Hayes will appear in multiple episodes as Terrence Falls, a comedic TV and film star who is making his Broadway debut in the musical “Liaisons." The new musical is based on the novel “Les Liaisons Dangereuses."
Look for Hayes' character to bring comic relief -- and some trouble -- as he becomes a "major thorn" in Ivy's (Megan Hilty) side.
Other new "Smash" additions include Jennifer Hudson, Jeremy Jordan and Andy Mientus.
"Smash" isn't Hayes' only new NBC gig. He'll also appear in multiple episodes of NBC's "Up All Night."
In other casting news ...
"Star Wars" veteran Billy Dee Williams will guest star on "NCIS." Williams will play LJ, a close friend of the Gibbs family. Look for him to pop up in an October episode. [TV Guide Magazine]
Alan Dale will pay the ladies of "Hot In Cleveland" a visit. Dale will appear in two episodes as Emmett an actor who has a thing for Victoria (Wendie Malick). [TV Guide Magazine]
Marin Ireland will co-star in AMC's new pilot. The project from Richard LaGravenese and director Tony Goldwyn follows a district attorney who uncovers evidence that leads to reopening a murder case. Ireland will play an employee of the Innocence Project. [Deadline]
Declan is getting a new friend on "Revenge." Michael Nardelli will recur on "Revenge" as Trey, a "preppy misfit" who befriends Declan (Connor Paolo). [TVLine]
Thomas Sadoski, "The Newsroom"
He currently appears as the unlikable Don Keefer on "The Newsroom," but Thomas Sadoski is mainly known for his stage career. Sadoski made his Broadway debut in 2004's "Reckless," and most recently appeared in 2011's "House Of Blue Leaves" and "Other Desert Cities."
John Gallagher Jr., "The Newsroom"
Now in HBO's "The Newsroom," Gallagher's original home was on the stage. He originated the role of Moritz Stiefel in "Spring Awakening" and starred in "American Idiot" and "Jerusalem."
Jane Krakowsi, "30 Rock"
Known for her role as the attention-seeking actress Jenna Maroney on NBC's "30 Rock," Krakowski has also appeared in Broadway productions of "Starlight Express" and "Once Upon A Mattress." She won a Tony in 2003 for her portrayal of Carla in "Nine."
Christopher Abbott, "Girls"
Marnie's (Allison William) way-too-sweet ex-boyfriend Charlie has also had a sweet stage career. Christopher Abbott appeared in 2011 revival of "House Of Blue Leaves" with Edie Falco and Ben Stiller.
Christine Baranski, "The Good Wife"
She plays the tough-as-nails Diane Lockhart on CBS's "The Good Wife," but Christine Baranski has also made the rounds on New York City stage. Baranski made her Broadway debut in "Hide & Seek" in 1980.
Anne Heche, "Save Me"
Anne Heche is returning to TV as Beth Harper, a woman who believes she's channeling God, on NBC's "Save Me," but Heche is also known for her stage career and memorable role in "Proof" in 2002.
Andrew Rannells, "The New Normal."
He's nabbed starring roles in "Hairspray" and "Book Of Mormon" on Broadway, and now Andrew Rannells is making his mark on the TV world. In addition to playing Hannah's ex-boyfriend on HBO's "Girls," Rannells will be starring on the NBC comedy "The New Normal" in the fall.