Seth Rogen on Cameron Diaz: "She Could Whip My...

Seth Rogen portrays the superhero star of The Green Hornet alongside Cameron Diaz, but the funnyman confessed the actress might have more heroic butt-kicking abilities than him.

"Cameron has long legs with incredible reach," Seth exclusively told OK! at the press conference for his upcoming movie, The Green Hornet, in San Diego on Friday.

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"She is fit, she she surfs and she has great stamina."

So how would the Knocked Up actor fare in a one-to-one situation with Cam? "I think Cameron would kick the s*** out me!" he declares. "She could whip my ass good. I will tell you that!"

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The writer, producer and actor who has shed pounds and toned up to play the green fedora-wearing icon admits he slimmed down for the role with basic "exercise and diet".