EXCLUSIVE: Read it here first...

Breaking: Paris and Stavros Split!

Mon., Mar. 19, 2007 6:02 PM PDT by Marc Malkin

Paris Hilton, Stavros Niarchos, Josh Henderson

Denise Truscello/WireImage.com,Jeffrey Mayer/WireImage.com

Have Paris Hilton and Stavros Niarchos split up again?

Sounds like it.

A close pal of the hotel heiress tells me they have called it quits. Hilton is said to be the one who ended things because Niarchos has never been too pleased with all the attention Hilton gets from her male admirers, the pal reports.

"He gets jealous, so they argue," the pal says. "Not sure if it is permanent, but they have not been seeing each other for the past couple of weeks."

Another pal tells me Hilton may have already moved on to Josh Henderson, a musican and actor who used to date Ashlee Simpson. You may also know him from Desperate Housewives, on which he played womanizing troublemaker Austin McCann.

The pal reports that Henderson and Hilton were spotted together at Area nightclub last Thursday and at one of Hilton's own house parties this weekend.

However, another friend says there's nothing brewing between Hilton and Henderson. "She's been over Stavros for a while," the friend says. "Now she's into just hanging out with her girlfriends."

Of course, don't be surprised if Hilton and Niarchos are back together by the time you finish reading this item.