Paris Doesn't Have to Search Far for Her New Guy

Could Nicole and Paris be double brides?

Well, we won't go that far just yet. But we can confirm that the childhood BFFs are officially dating twins.

"They've been dating about three weeks," says a source close to Hilton and Benji Madden. "Just kind of quietly hooking up and getting to know each other better. But so far, he's really into her. And Paris really likes him, too!"

Guess the engines started revving when the pair began visiting Nicole and Joel Madden's baby girl, Harlow.

"They've known each other since before then, but that's when they really started talking," says a Benji pal. "And they hit it off."

Still, the pair didn't make a public appearance until recently, when Paris and the Good Charlotte rocker went on a double date to Villa nightclub with Nicky Hilton and David Katzenberg.

"They spent the entire night in a corner, holding hands," says an eyewitness. "It was really sweet."

And what does Nicole think of her best pal hooking up with her fiancé's brother?

"She loves it," says a Nic friend. "Paris and Nicole are like sisters! And now that they are dating brothers, it's just a great setup. Plus, everyone thinks Benji could be really good for Paris. He's very mature and grounded, like his brother."

So, what's next—could Paris and Benji follow in Nicole and Joel's footsteps, creating a little babe of their own?

"Probably not yet," laughs a friend of the couple. "For now, Harlow's enough baby for everybody."