J. Lo and her hot, younger man are flirting up a storm on the set of their new movie!

It’s hotter than ever in Atlanta, Ga., now that Jennifer Lopez and Rodrigo Santoro have begun shooting scenes for their new movie, What To Expect When You’re Expecting. An on-set source says sexy 35-year-old Rodrigo is making her forget all about her ex, Marc Anthony. ”There is amazing chemistry between them,” the source tells Life & Style. “Jennifer can’t get over how hot Rodrigo is.”

And is it any wonder why J. Lo is drawn to Rodrigo? He’s the complete opposite of her controlling ex Marc!

“Where Marc was always trying to hang around J. Lo and manage and manipulate and swing deals, Rodrigo is easygoing and not threatened by her,” the source divulges. “He’s a good guy — he reads a lot, is very smart and just oozes sexuality.”

Besides giving each other “love taps” between scenes, J. Lo and Rodrigo have also been spotted hanging out alone in her trailer! And a friend of J. Lo tells the mag she wouldn’t be surprised if the single songstress decides to take things to the next level with Rodrigo.

“Jennifer doesn’t like to be alone,” a friend tells the mag. “She likes to have a man around, and Rodrigo is exactly her type!”