Hot off her role as Asgardian warrior Sif in Marvel’s “Thor,” Jaimie Alexander has landed the female lead opposite Arnold Schwarzenegger in Lionsgate’s actioner “Last Stand.”South Korean helmer Kim Jee-Woon directs the pic, which finds Schwarzenegger playing the sheriff of a sleepy little town who runs up against an escaped drug cartel leader heading for the Mexican border. Alexander will play Sarah Torrance, a beautiful cop under Schwarzenegger’s command who enjoys a playful romance with fellow officer Frank Martinez, who will be played by “300″ star Rodrigo Santoro. Peter Stormare and Zach Gilford co-star in the film, which is being produced by Lorenzo di Bonaventura. Andrew Knauer wrote the original spec script that was subsequently rewritten by Jeffrey Nachmanoff and more recently, George Nolfi. Lionsgate has worldwide distribution rights on the pic, due to hit theaters Jan. 18, 2013. Production starts Oct. 20 in New Mexico. Alexander will shoot “Last Stand” before she returns for the “Thor” sequel. Thesp, who recently completed an arc as Edie Falco’s erratic sister-in-law on Showtime’s “Nurse Jackie,” will soon be seen opposite Peter Facinelli in the indie dramedy “Loosies.” She also co-stars in the historical drama “Savannah” alongside Jim Caviezel, Chiwetel Ejiofor and Hal Holbrook. Alexander is repped by WME and James/Levy Management.