The star reveals he has already started writing his own songs and would love to show off his musical talents on the stage - although he doesn't like the idea of being the centre of attention.
But he insists his work would have a more classical sound, compared to Meester and Momsen's pop/rock songs.
He tells America's InStyle magazine, "My dream is to play live shows with a small orchestra - strings, horns, an organ. I'd play keyboards and guitar and sing. But I wouldn't be the frontman."
Badgley already has one fan of his music - his Gossip Girl co-star and real life girlfriend Blake Lively, who served as his muse for one particular song.
He says, "The best gift I've ever given was a song I wrote... She seemed to like it."