09/10/2010 11:44 am ET Updated Dec 06, 2017

Ali Larter Confirms She Is Having A Boy (VIDEO)

Ali Larter visited 'Late Night with Jimmy Fallon' on Thursday and confirmed that her unborn child will be a boy. Fallon offered her a choice of a pink or blue onesie, and she chose the blue one.

"I was trying to keep it private, but we're having a boy!" she said. "I have a little penis inside of me."

Ali's son will be her first child with husband Hayes MacArthur.

See photos of Ali showing off her big baby bump last week here.