Michelle Trachtenberg has snagged a multi-episode arc on "Gossip Girl," the CW's freshman drama about privileged Manhattan high school students.

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 ("The O.C.") was rumored to have been up for the role.

The arc will air during the May sweeps.

Trachtenberg 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."