"A Gossip Girl insider confirms to me exclusively that Broadway vet Aaron Tveit is reprising his role as Nate's wealthy cousin, Tripp Vanderbilt, this November for at least six episodes.
Idle Gossip says the politically minded Tripp will announce that he's running for office (possibly the senate) and Nate will get involved with his campaign. I'm told Holley Fain, who played Tripp's fiance, will also be returning for multiple episodes.
Tveit will juggle his Gossip arc with his current gig on Broadway in Next to Normal.
In other GG casting news, Sarah Steele (Spanglish) has been cast in the potentially recurring role of Kira Abernathy, a Constance Billard student who attempts to befriend queen bee Jenny. Her first episode airs Nov. 9."