Welsh actress Saoirse Ronan, who was nominated for the Oscar two years ago as the scheming younger sister in the film ATONEMENT, is set to star in THE HOST, the screen adaptation of the bestselling novel by TWILIGHT SAGA author Stephenie Meyer. The young actress will play one of the last humans left on earth who must fight an alien species of parasites called Souls. These parasites invade human bodies, fuse to each person’s consciousness and systematically erase their personalities. The film will be pre-sold at next week’s Cannes Film Festival by sales agent Inferno Films. Ronan has become one of the busiest young actresses in Hollywood, with strong performances in last year’s THE LOVELY BONES and the current action hit HANNA.