Niarchos may leave Paris Hilton and go back to Mary-Kate

Is it me or do the Greek billionaires in Paris Hilton's life come with some kind of built in expiration date? Her fling with Paris Latsis, 22, lasted a total of nine months.

And now, according to Star Magazine, Stavros Niarchos III, is now getting fidgety. Sources tell the Star that he desires to get back with Mary-Kate Olsen, 19, whom he dumped for Hilton.

"He's missing the old times with Mary- Kate," the source dishes. "The sex with Paris is white-hot, but the novelty is wearing off and the constant drama is starting to get to him, not to mention the pressure from his family to dump her."