Michelle Trachtenberg

Michelle Trachtenberg is set to reprise her role as Georgina Sparks for a multi-episode arc on Gossip Girl, TVLine.com reports.

Buffy the Vampire Slayer: Then and now

Trachtenberg will return in the 100th episode to stir up even more trouble. When we last saw her, she came to the aide of faux-Charlie (Kaylee DeFer) before learning her true identity.

Following her first turn on Gossip Girl, the Buffy alum went on to star in NBC's short-lived Mercy, followed by a recent stint on Weeds.