(USA TODAY) Buzz is bubbling up that George Clooney, 52, is single again.

Clooney, who has been dating Stacy Keibler, 33, for the past two years, apparently have called it quits.

According toRadarOnline, the two were last seen together in public on March 16 in Germany.

This past holiday weekend, Clooney was spotted at his Lake Como estate in Italy without her on July 4. And Keibler posted a photo ofherselfin Malibu on July 3. She's is busy working on her new Lifetime TV series,Supermarket Superstar, premiering July 22. He's working on the film,Monuments Men.

Peoplemag reports that it was Stacy's doing because she "wants to have children and a family someday," a source says.

No official word from either camp.

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