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OTRC: Olivia Wilde goes nude for 'Cowboys and Aliens' in 'Cowboys and Aliens' trailer - watch

Olivia Wilde appears in a still from the trailer for 'Cowboys and Aliens.' (Universal Pictures)

Olivia Wilde appears nude in the new trailer for the Universal Studios science fiction Western, "Cowboys & Aliens," which premiered during Thursday's "American Idol."

In the film, Jake Lonergan (Daniel Craig) wakes up with no memory of his past and a shackle around his wrist. He goes into the town of Absolution and learns he's a wanted criminal and the man who runs the town (Harrison Ford) wants him gone, but when aliens start attacking the town and stealing their people, it becomes clear that Lonergan holds the key to defeating them.

The movie is based on a 2006 graphic novel of the same name, created by Scott Mitchell Rosenberg. Jon Favreau signed on to direct and Steven Spielberg is the executive producer, with Brian Grazer and Ron Howard producing.

Robert Downey Jr. was originally cast as the protagonist, but had to drop out due to his commitment to "Sherlock Holmes: A Game of Shadows."

"Cowboys & Aliens" is set for release on July 29, 2011. Watch the trailer below.

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