'Gossip Girl' Season 6 casts '7th Heaven' star Barry Watson as Serena's love interest

We'd heard rumblings that the final season of "Gossip Girl" might feature a solid love interest for Serena (Blake Lively) -- and now we know who is playing him!

"7th Heaven" star Barry Watson has landed the role of Serena's new beau, Steven Spence. TVLine reports that Spence is an "entrepreneur," but doesn't go into further detail about his trade.

Hmmmm.

Serena didn't exactly end Season 5 in a good place -- she'd just made a sex tape with her best friend's boyfriend (always a no-no) and seemed to be reverting to her former bad-girl ways. Could Spence be the guy who brings her back to earth? Or will he be a further bad influence? We'll find out on Monday, October 8, when "Gossip Girl" returns for its final season.

Do you think that Spence will be Serena's "endgame" romance? Or will she reunite with one of her former flames -- Dan or Nate -- as the season comes to a close?