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Kristen Stewart goes topless in 'On the Road' trailer

We've seen her get married and have a baby, but this is a whole new K. Stew!

The debut of the trailer for "Twilight" actress Kristen Stewart's latest role in the movie adaptation of Jack Kerouac's novel "On the Road" has arrived, offering fans a gander at director Walter Salles' take on the Beat Generation -- and Kristen topless!

RELATED: First Look! Kristen Stewart in 'On The Road'

The actress, who plays Marylou in the flick, is seen sitting topless while cruising the roads with fellow shirtless co-stars Garrett Hedlund and Sam Riley. The weather ain't all that's hot!

Joining Kristen, Garrett and Sam -- although with their tops on--is an A-list cast that includes Amy Adams, Viggo Mortensen, Kirsten Dunst, Steve Buscemi, Terrence Howard and Elisabeth Moss.

MORE: Kristen Stewart Loves Her "Risk-Taking" Costar Garrett Hedlund

"On the Road" follows a young writer named Sal Paradise (Riley) and his Dean Moriarty (Garrett), who are the poster-kids for the Beat Generation when they hit the highway on a nationwide search for "it"--along with Dean's wife Marylou (Stewart).

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The flick is set to premiere at the Cannes Film Festival later this year.