'NCIS: LA' casts 'Gossip Girl' alum Michelle Trachtenberg as guest star

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This "Gossip Girl" alum is leaving New York for Los Angeles.

Michelle Trachtenberg has just been tapped to guest star on an upcoming episode of "NCIS: LA," TVGuide.com reports.

Trachtenberg, best known for her roles on "Gossip Girl" and "Buffy the Vampire Slayer," will play Lily, a charming and physically capable environmentalist and private chef. When a scary home invasion turns her life upside down, she does her best to show a brave face, despite dangerous and uncertain circumstances.

The holiday-themed episode is set to air Tuesday, Dec. 17 at 9 p.m. ET on CBS.

Photo/Video credit: Getty Images
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