Updated

Jennifer Garner is a well-behaved mother of three these days, but she revealed to Conan O’Brien she used to get a kick out of streaking.

On Tuesday night’s “Conan,” Ben Affleck’s wife dished that she used to love stripping down and running around in the buff.

PHOTOS: Celebs who've gone topless for magazines

"When I was in college, every summer I would work for free at a theater," Garner, 42, said. "I didn't drink. I was never a big party girl, but I streaked," she continued with caution. "I was just in a 'naked frame of mind' …I might have been the leader of the streakers and we just all streaked all summer."

Garner then asked O’Brien if he ever just felt like streaking, to which he replied: "I was always encouraged to be clothed at all times."

PHOTOS: Jen Garner, supermom!

More On This...