Blake Lively, Sarah Michelle Gellar, David Boreanaz, Ed Westwick, Kim Cattrall, Kenan Thompson, Melissa Joan Hart and more shared tributes to Trachtenberg.

From "Gossip Girl" to "The Ice Princess" and "Buffy the Vampire Slayer," here's a look at Michelle Trachtenberg's career in photos.

Michelle Trachtenberg starred in “Harriet the Spy” at just 10 years old, and went on to appear in “Buffy the Vampire Slayer,” “Gossip Girl,” “Ice Princess” and “Eurotrip.” Trachtenberg started acting at just 3 years old before joining Nickelodeon’s “The Adventures of Pete and Pete.