Michelle Trachtenberg's NCIS: Los Angeles banter is leaving Callen and Sam speechless.

The former Gossip Girl is guest staring as Lilly Lockhart on the CBS drama's holiday episode, "Christmas Evasion." While NCIS tries to determine if her home invasion case is potentially linked to her father, Senator Lockhart (John Getz), and his recent crack down on International Cyber Warfare, Lilly must be chaperoned by Callen (Chris O'Donnell) and Sam (LL Cool J).

Although the Senator's daughter is rather displeased about dear old Dad's sudden intrusion into her life, it sounds like the Agents' precautionary protection is more than warranted. Trachtenberg's character will be thrown into the thick of the action on Tuesday night.

"We're very excited to have Michelle guest on the show," said series creator Shane Brennan, TV Line. "It's a very intense episode which pairs Michelle with Callen and Sam (played by Chris O'Donnell and LL Cool J), in what is probably one of our biggest action shows so far this season."

Despite the huge amount of fight choreography and stunt work that undoubtedly went into the actress' upcoming action scenes, Trachtenberg had no problems toughing it out on set.

"Having an awesome time working with @chrisodonnell & @llcoolj on @NCISLA_CBS! So far, I've only needed a few ice packs! #Stunts #ToughGirl," the 28-year-old tweeted while filming before Thanksgiving.

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Click on the video below to see a sneak peek of Trachtenberg, O'Donnell, and LL Cool J, and check out the photo above to get a behind the scenes look at the trio while filming.

NCIS: Los Angeles airs Tuesdays at 9 p.m. ET on CBS.

Tags
NCIS: Los Angeles, Television, CBS