Jennifer Lopez's Twins are "Best Behaved Kids in the World"

Jennifer Lopez needs no back up plan when it comes to motherhood to two-year-old twins Max and Emme.

“They’re some of the best behaved kids in the world,” she told Access Hollywood of her toddlers at the premiere of her new film, The Back-up Plan.

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“But you know, when they get to two, they start getting willful and I think that’s what people talk about. They just start testing the boundaries a little bit.”

The star added that bringing her kids to the set of her new romantic comedy on her first day was “one of the best days of my life.”

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“It was an amazing thing for me to be able to do,” she said. “Because obviously having the babies was the biggest thing that’s ever happened to me and probably ever will happen to me.”

J.Lo may be a hands-on mother but she's not afraid to get some assistance. “I’m not gonna lie,” she said. “I’m a working mom, but I have people help me so I can get away and do what I have to do.

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"It’s tough! It’s different than when it was just me, you know, just doing my thing.”