In order to properly fulfill their duties as characters who swap bodies in raunchy comedy "The Change-Up," stars Ryan Reynolds and Jason Bateman spent some quality time learning each other's respective personality traits and mannerisms. Unsurprisingly, when the film wrapped, the real-life friends found that letting go of their newly acquired traits wasn't easy.

"Some of them stuck with me," Reynolds told MTV News, recalling a phrase he had used earlier. "Like when I said 'real long,' that's you," he said, turning to Bateman. "I'm doing you right there."

"This guy will motivate you to work a little bit harder," Bateman said, shifting the discussion toward flat-out praise for Reynolds' acting abilities, including his impression of Bateman himself. "[What] some actors will do when you're doing comedies is that, during the time it takes between when you rehearse a scene and when you shoot it, they light the scene," he explained. "You go in your dressing room, and if you have a good work ethic, you'll write down some extra jokes to say when they shoot the scene. This guy, they just fall right out of his head, quickly and as high-quality as Mr. Vince Vaughn. I don't have those skills," Bateman admitted. "I have to write stuff down. He forces my game up quite a bit, so I did a lot of studying in my trailer."

"What a nice thing to say," Reynolds said to Bateman.

When asked if either actor ever felt awkward watching his friend impersonate the other onscreen, Reynolds admitted that Bateman did such a good job that he felt envious of his friend's role.

"You know what was unsettling is he did it so damn well that I sort of sat there going, 'God, I should have played that part,' " he admitted. " 'I should have done that one. That looks like fun.' "

Check out everything we've got on "The Change-Up."

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