Peter Sarsgaard has been cast as the villain in "Green Lantern," the Warner Bros. big budget picture based on the DC Comic character. He joins star Ryan Reynolds, who is taking on the lead role of the Green Lantern and Blake Lively, who was recently cast as Reynolds' love interest.

Martin Campbell is directing the film about Hal Jordan, the "test pilot who finds a downed spacecraft with a dying alien who passes him a powerful ring, introducing Jordan to an interstellar police force known as the Green Lanterns." Sarsgaard will play Dr. Hector Hammond, the pathologist son of a senator who is seen as a disappointment in his father's eyes. He becomes infused with psychic powers when he discovers a meteor.

Filming begins in March in New Orleans.