On May 2nd, Blair and Serena are frenemies once again in the Gossip Girl season 4 episode “The Princesses and the Frog.” But the promo only shows us how much Chuck will not be standing for Blair’s new romance with Prince Louis.

Gossip Girl The Princesses and the Frog Summary

IT’S WAR BETWEEN SERENA AND BLAIR — Blair’s (Leighton Meester) dreams appear to be coming true, but Serena (Blake Lively) threatens to jeopardize it all by dredging up Blair’s past. Charlie (guest star Kaylee DeFer) befriends Vanessa (Jessica Szohr), who may or may not have a hidden agenda. Nate (Chace Crawford) is torn between his relationship with Raina (guest star Tika Sumpter) and a truth he must keep hidden out of loyalty to Chuck (Ed Westwick). Jessica Szohr, Kelly Rutherford and Matthew Settle also star. Andrew McCarthy directed the episode written by Leila Gerstein (Gossip Girl season 4 episode 20).

Gossip Girl The Princesses and the Frog Promo

Gossip Girl The Princesses and the Frog Pictures

Photo Credit: Giovanni Rufino / The CW