It seems we might be one step closer to finding out who Serena van der Woodsen's father is. According to The Hollywood Reporter, Matt Barr has signed on to play Keith van der Woodsen in the CW Network's Gossip Girl spin-off series.

Barr would portray the love interest to Lily (Brittany Snow) and, while the network wouldn't comment further, it is believed Barr's Keith van der Woodsen character could end up being Lily's future husband and father to Blake Lively's Serena van der Woodsen character on the original series.

The series is set in 1980s Los Angeles and will revolve around the teen years of Lily, Serena van der Woodsen's mother.