Maggie Grace (“Taken”) has joined the cast of Summit Entertainment’s “The Twilight Saga: Breaking Dawn.”

Grace will portray the vampire character Irina, a member of the Denali coven in Stephenie Meyer’s four-book series.

Bill Condon is directing “Breaking Dawn,” based on the final tome in the series, in two parts. Book centers on the mortal Bella marrying the vampire Edward, and Bella giving birth to a half-vampire, half-human daughter, Renesmee.

Studio announced in June that it had decided to split the final film in two, with the first set to open Nov. 18, 2011, and the final on Nov. 16, 2012. Wyck Godfrey, Karen Rosenfelt and Meyer are producing, with scribe Melissa Rosenberg adapting each installment.

Grace was a regular on “Lost” and also appeared in “The Fog.” and “The Jane Austen Book Club.” She will next be seen in CBS Films’ “Faster,” opening Nov. 24.

Grace is repped by UTA and managed by Global Creative.