Michelle Trachtenberg is coming to “Gossip Girl.” Woooo hoo! She’ll be doing a multi-episode arc and may be join the cast full time for its second season.

Trachtenberg will play Georgina Sparks, a character who appears in the novels on which the series is based. Georgina rolls into Manhattan from rehab, shaking up and torturing the life of Serena van der Woodsen (Blake Lively).