Kelli Garner stars as Kate Ryan on NBC's new drama series "The Enemy Within."

Garner is best known for her breakout role as real-life actress Faith Domergue, opposite Leonardo DiCaprio, in Martin Scorsese’s award-winning film "The Aviator" as well as the part of Margo in "Lars and the Real Girl," opposite Ryan Gosling.

Garner began her film career in "Bully" and followed that up with "Thumbsucker," directed by Mike Mills; "Man of the House," opposite Tommy Lee Jones; and "Taking Woodstock," directed by Ang Lee.

On the stage, she starred alongside Dianne Wiest and Alan Cumming in the Classic Stage Company’s off-Broadway production of Anton Chekhov’s "The Seagull." Her other theater work includes "Dog Sees God: Confessions of a Teenage Blockhead," written by Bert Royal, and "1+1" and "Suburbia," both written by Eric Bogosian.

Garner last appeared in the Lifetime miniseries "The Secret Life of Marilyn Monroe," alongside Susan Sarandon and Emily Watson, as well as "One More Time," which premiered at the Tribeca Film Festival, alongside Christopher Walken and Amber Heard. She also had a recurring role on the HBO series "Looking" and starred opposite Christina Ricci on the ABC series "Pan Am" from Thomas Schlamme and on "My Generation" from Noah Hawley.