Second-Time Mom Jill Hennessy Debuts Post-Baby Body

Second-Time Mom Jill Hennessy Debuts Post-Baby Body
Jill Hennessy
Michael Loccisano/FilmMagic

04/08/2008 AT 12:20 PM EDT

On Monday night, Jill Hennessy made her first major public appearance since welcoming her second child last November – and the former Crossing Jordan star looked better than ever.

Her secret to losing the pregnancy weight: "A lot of nursing," Hennessy told PEOPLE at the Food Bank for New York City's Can-Do Awards. "When you are nursing a small infant it literally sucks everything out of you."

The 39-year-old actress, who gave birth to her second son, Gianni, on Nov. 21, also credits "a little bit of yoga" with her sleek physique. "Yoga is a great thing, it really helps you get back into shape," she said. "It wasn't easy though. Trust me!"

The former Law & Order star and her husband, Paolo Mastropietro, also have an older son, Marco, 4 (who had already volunteered for diaper duty).

How has their household changed since the baby? "Having a second child has made me enjoy both of them even more – even though you sometimes want to pull your hair," she said. "I'm taking it one day at a time and it's been amazing. These kids of mine are incredibly cool."

Luckily, the new addition keeps the fussing to a minimum. "He laughs all the time," she said. "To be honest, I didn't know a baby could be like this. He's completely fun and he hangs out and parties. He actually sleeps really well too, which is great. I'm shocked!"

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