PHOTOS: 'Man of Steel' Set Photos Reveal Henry Cavill's Superman Costume Changes

The new look ditches Superman's iconic red underpants, worn over a skintight blue suit.

"Why wear underpants when you can be far more revealing?" Cavill quipped.

PHOTO: Henry Cavill as Superman in 'Man of Steel'

Replied Leno: "I never got the underpants outside of the clothes anyway. ... Whatever thing you had of Superman, you lose with the underpants outside the clothes, basically."

Man of Steel is in production for a 2013 release.

VIDEO: 'Immortals' Trailer

Meanwhile, Cavill -- who was recently featured as one of The Hollywood Reporter's Next Gen Class of 2011 -- next appears on the big screen in Immortals opposite Mickey Rourke and Freida Pinto. The Greek gods action film, which premiered Monday night at Nokia Theatre L.A. Live in Los Angeles, opens Friday.