The 26-year-old actress was spotted sharing a kiss with the 47-year-old director in New York City on Wednesday night, unable to keep their hands off one another as they walked the city streets.
J.Law looked cozy in an oversized black coat and scarf, accessorizing with a pair of gray boots and tying her hair back in a pony tail. Aronofsky, on the other hand, donned a blue button-down with a scarf, glasses and a newsboy cap.
Rumors started swirling around the couple in mid-October after they were photographed out and about together several times.
A source tells E! News the couple has been pretty much "official since August." In fact, Aronofsky's dad has had "some medical issues, and she is very supportive and has even visited him in hospital.."
Not to mention, the insider says she bought an apartment in NYC, where the director lives.
"He went through a bad breakup with his ex, so he needs to have fun," the source added. "He isn't a ladies man. He's the most amazing guy."
Our insider isn't sure whether J.Law has met Aronofsky's 10-year-old son Henry—who he shares custody of with ex Rachel Weisz—yet, but the source says she "seems very comfy with his family."
Meanwhile, the pair was photographed together again over the weekend, sharing a lollipop in NYC.
An eyewitness told E! News they "were laughing and smiling while walking with her dog [Pippa]" and definitely "look[ed] like a couple."
Though neither J.Law nor Aronofsky have confirmed the relationship, a source told People magazine that they've "been hanging out and are casually dating."