Bart will appear this season in episode 12. He will play Mason Treadwell, a rich, pretentious journalist who's written a tell-all book about Long Island high society.
As previously reported, the performer will co-star alongside Bradley Whitford and Michael O'Keefe in the Pasadena Playhouse production of Yasmina Reza's Art. Performances will run Jan. 24-Feb. 19, 2012, in Pasadena, CA.
Bart won the Tony Award in 1999 for his performance in You're a Good Man, Charlie Brown. He was nominated for his performance in The Producers and has also been seen on Broadway in Big River, King David, Triumph of Love, The Frogs and Young Frankenstein.
"Revenge" airs Wednesday nights at 10 PM ET on ABC.