Actor Simon Miller is coming to Gossip Girl this September in a guest starring role ... that he's already played before. Remember Olivia's co-star from Season 3?

Miller appeared in two episodes as an actor known for playing vampires. His character grew entangled in a love triangle between Olivia (Hilary Duff) and Dan.

He'll appear in one episode this fall - the Season 5 premiere.

Simon Miller has also appeared on another CW hit, The Vampire Diaries.

The CW just picked up two more episodes of Gossip Girl for the coming season, meaning we'll see a super-sized fifth campaign of 24 installments in all.

The show returns Monday, Sept. 26 at 8 p.m., followed by Hart of Dixie.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.