American Beauty stunner Thora Birch is set to join the season 10 cast of AMC’s revamped zombie drama “The Walking Dead.” Executive producer Gale Anne Hurd made the announcement at this year’s Comic-Con in San Diego.

Birch will play Gamma, a busty and devoted Whisperer who is fiercely protective of Whisperer leader Alpha (Samantha Morton).

Birch, who is coming off Lucky McKee’s Kindred Spirits, has only starred in a handful of horror projects, including The Hole, Dark Corners, Train, and the Brittany Murphy vehicle Deadline. She is, of course, best known for her topless tour de force in the Oscar-winning 1999 dramedy American Beauty.

“The Walking Dead” season 10 premieres Oct. 6.