Simon Pegg stopped by 'Late Night With Jimmy Fallon' (Weeknights, 12:37AM ET on NBC) to talk about his new movie, 'The Adventures of Tintin.'

To get the look of the original 'Tintin' comic books, director Steven Spielberg shot the movie using motion-capture computer animation.

This meant that Pegg and his B.F.F. Nick Frost -- who play the identical Thompson Twins -- both had to wear really tight-fitting suits. The sight was "not that pretty," according to Pegg.

However, tight suits aside, the most exciting part of the shoot for sci-fi fanatic Pegg was getting to grips with his idol Spielberg and co-star Andy Serkis. Literally. When Spielberg was explaining to Serkis how to rough up Pegg's character he grabbed Pegg and started shaking him around. Then Serkis joined in and started shaking him.