Lena Headey is set to face off against Karl Urban and Olivia Thirlby in director Pete Travis’ Dredd 3-D, a big screen adaptation of the U.K. comic-strip Judge Dredd. Headey is reportedly playing sinister gang-leader Madeline Madrigal (AKA: Ma-Ma).

The film, penned by Alex Garland (28 Days Later), is currently shooting in South Africa on a reported budget of $45 million and stars Urban and Thirlby as Mega City One judges Joe Dredd and Cassandra Anderson.

Headey is best known for her performances as the topless Queen of Sparta in Zach Snyder’s 300 and as Sarah Conner on the short-lived Fox series “Terminator: The Sarah Conner Chronicles.” She has also starred in such notable frighteners as Laid to Rest, After Dark’s The Broken, Screen Gems’ The Cave, and Terry Gilliam’s The Brothers Grimm.