Matt Barr joins 'Gossip Girl' spinoff

Character thought to be Serena's father, Lily's husband

More pilot news

Serena's father revealed?

"One Tree Hill" alum Matt Barr has been cast in the CW's "Gossip Girl" spinoff as Keith van der Woodsen, a rich and handsome Malibu prince who is the love interest to Lily Rhodes (Brittany Snow).

Set in 1980s Los Angeles, the "Gossip Girl" spinoff chronicles Lily's wild teen years.

While the producers of the WBTV/Alloy project wouldn't give more clues about the Keith character, speculation is that he could be Lily's future husband (Lily's married name is Lily van der Woodsen) and father of Serena van der Woodsen.

Barr, repped by Pakula King and Luber Roklin, next appears on CBS' limited series "Harper's Island."