The 29-year-old "Veronica Mars" alum has landed a major role on the continuation of the 1990s series, but details of her characters are still kept under wraps, reported Ace Showbiz.
Seyfried would be playing a pivotal new character and has apparently been booked for multiple episodes.
"Twin Peaks" revival marks her biggest TV gig since she appeared in 44 episodes of the drama series "Big Love".
The new "Twin Peaks" series will consist of 18 episodes which all are written by co-creators Lynch and Mark Frost.
Filming is currently underway in Washington state with original cast members Kyle MacLachlan, Sheryl Lee, Dana Ashbook and Sherilyn Fenn returning to reprise their roles.
No premiere date is announced for the new series yet.
Seyfried was a series regular on "As the World Turns" from 1999 until 2001. She recently starred in "While We're Young" and will be next seen in "Pan".
