Cobra Starship and former Midtown frontman Gabe Saporta will guest star on the upcoming season finale of The CW’s Gossip Girl.

An E! Online source reports that the 32-year-old singer will join the cast as a “character that is not a musician.”

Saporta is familiar with the Gossip Girl world, having collaborated with star Leighton Meester (Blair Waldorf) on his band’s 2009 hit, “Good Girls Go Bad.” The actress added vocals to the track and also appeared in the music video.

The source told E! Online:

Acting is something that has been of interest to him for a while. So when he was offered the role, he jumped at it.

The Gossip Girl season 5 finale, titled “The Return of the Ring,” airs May 14 at 8 p.m. EST. Sara Goodman wrote the episode, which J. Miller Tobin directed.