Apparently, a couple of Gossip Girl characters get into a huge fight in a future episode of the show's upcoming second season.

Curious as to who it is? Follow the jump and see ...

Yup, it's Serena van der Woodsen (Blake Lively) and Blair Waldorf (Leighton Meester)! It looks like they really go at it, as well!

The gorgeous actresses filmed an epic cat-fight scene at a house in Brooklyn - plenty of hair-pulling, shoving and shouting ensued.

Click on the action shots below to enlarge ... and tell us what you think Blair and Serena might be fighting about this time.

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