Matt Damon's wife Luciana is pregnant with the couple's third child. At the premiere for "The Town," Damon joked, "We're in the third trimester and basically I'm just dodging punches right now from my wife... That means I have to work on my defense and I never know when a left hook or a right cross is going to come. She's been pregnant basically for more than half of the last five years and she's been nursing the other half so I've definitely asked about as much as I can from my wife. Now I'm all hers!" [Huffington Post]

It must be a strange position to be in—witnessing this miracle alien thing growing in your loved one. Thankfully for us, we've got some insight into the mind of men as these celebs have told us about their pregnant significant others.