Michelle Trachtenberg has snagged a multiepisode arc on the CW's buzzworthy freshman drama "Gossip Girl."

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).

Mischa Barton was rumored to have been up for the role.

The arc will air for the May sweep.

Trachtenberg, repped by CAA and Framework, recently wrapped the New Line comedy "Seventeen Again," in which she stars opposite Zac Efron. She next appears alongside Topher Grace and Anna Faris in Universal/Imagine's ensemble comedy "Kids in America."