Nicole Richie Puts Joel Madden on a Diet

When there's a newborn in the house, it's typically the mother who's trying to lose the baby weight ... except in the case of baby Harlow Madden's parents. Mom Nicole Richie had no trouble getting back into near skeleton shape -- it's dad Joel Madden who's had to work off the baby weight. Thankfully, Nicole is an expert at dieting, and she's using her know-how to help Joel slim down.

According to a source, Nicole has banned high calorie junk food from their house. "Joel laughed it off at once, but Nicole became a food vigilante," says the source. "She has banned fried food and most sugary items from the house. This was a true hardship for Joel because he was a junk food junkie. After some initial grumbling, Joel turned out to be a model dieter, much to Nicole's delight. He is raving about sleeping better and having more energy."

Will Joel turn into the latest bobble head to rule the scene in Hollywood? Time will tell.