She's worked in a few movies like Joyful Noise and in Grease Live.
She is the daughter of Nancy Zuncic, an actress, singer, and former flight attendant, and Frank Chlumsky Jr.
For a while, Trachtenberg was cast in kid movies like Ice Princess even as she grew up into a hotter lady.
This led to her most famous role of Dawn on Buffy the Vampire Slayer, a big hit.
Since 2009, Chlumsky has appeared in the political satire In the Loop alongside Peter Capaldi, Tom Hollander, Chris Addison, James Gandolfini, and Mimi Kennedy.
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