People are actually playing the odds on what the pair will name their first child.

Marco is the front runner at 4:1 reports TMZ.com

It's always fun to see what stars will name their next of kin. We asked BabyNames.com founder and Mom•Logic friend Jennifer Moss about the trends in celebaby names. "Celebrities are usually the ones picking unique names," says Moss. "Movie stars are artists by nature, plus they like attention."

Rate celebrity names in our photo gallery!