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Jennifer Lopez sure does have a thing for younger men, doesn't she?!

The "American Idol" judge -- even though she's been linked back to her younger ex Casper Smart -- was reportedly getting a little friendly with her "The Boy Next Door" co-star Ryan Guzman after the Golden Globes.

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Page Six is reporting that J.Lo, 45, and her 27-year-old co-star also "left an afterparty together after getting a little closer on a couch."

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The Weinstein Co. and Netflix party was attended by a slew of Hollywood biggest names, but it seems both J.Lo and her on-screen boy toy only had eyes for each other.

"At one point, Ryan moved back on the couch and then he put his arm around Jennifer," a source told Page Six. Earlier in the evening, the duo walked the Golden Globes red carpet together, as well.

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Though recent reports have indicated that J.Lo and Casper are back together, J.Lo recently denied it, saying, "I'm single right now."

At "The Boy Next Door" press junket, she told Us Weekly, "I think being on my own has been really great for me," she told Us. "There was a time where I was just like 'Ehhh, I'm just not going to deal with anybody, I just want to be on my own.' Now I'm getting back into the mix. For right now, I just have no announcements to make."