Bruce Willis to be a dad for the fourth time

(CBS) Bruce Willis is going to be a dad again.

The actor and his wife, model/designer Emma Hemming, are expecting a baby.

Pictures: Celebrity baby bumps

Willis, 56, and Hemming, 35, are "overjoyed with this news and they look forward to welcoming this newest addition into their family," his rep tells USA Today.

This will be the couple's first child. They tied the knot in March 2009.

Willis is already a dad to daughters Rumer, 23, Scout, 20, and Tallulah, 19, with ex-wife Demi Moore.