michelle trachtenberg ncis la 'NCIS: LA' casts 'Gossip Girl' alum Michelle Trachtenberg as guest star

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.