06/14/2012 09:38 am ET

Hilary Duff: Baby Luca Is 'Cute When He's Mad'

Someone's not a happy camper!

New mom Hilary Duff shared a photo of her baby boy, Luca, on Twitter this week and the little guy did not look too pleased, to say the least. However, Duff, who welcomed her son almost three months ago, still thinks he's simply adorable, tears and all, writing, "He is cute when he's mad!"

Duff and her husband, Mike Comrie, became parents to Luca Cruz on March 20, and since then we've seen Duff hitting the gym to get back into her pre-baby shape, though she claims she's not doing anything crazy to lose the pounds.

"I think if you ask any pregnant mom, they're like 'I want my body back,' but it takes time," she told Us Weekly earlier this month. "It takes nine months for your body to get that way and it's putting on that weight on purpose. The second I start to get down like 'what happened to my body,' I look at my beautiful baby and I've never been more appreciative for the body that I have."

Check out Duff's adorable photo below:

Check out other photos of stars out with their kids below:

Celebrity Kids: Out And About