Play on, Playboy

Left to right: Bridget Marquardt, Hugh Hefner, Holly Madison, and Kendra Wilkinson arrive at the American Film Institute Life Achievement Award dinner honoring Warren Beatty on June 12 in Los Angeles. (AP Photo/Matt Sayles)

TMZ learned from Holly Madison's own mouth Monday that Holly, 28, and Playboy founder and editor-in-chief Hugh Hefner, 82, have called it quits. The couple was together for seven years.

Rumors have been circulating recently about Holly's alleged relationship (the nature of which is still unclear) with magician Criss Angel. Hef, of course, is still married and living next door to Kimberley Conrad, his wife and the mother of his two youngest children. Wow. He's got a lot of people to keep track of at his age. And most of them are blond. Wonder how often he gets them confused.

Here's the thing. Anyone who has seen "The Girls Next Door" knows about Holly's obsession with having Hef's baby. My (Katherine's) thought is that after seven years, she got tired of waiting for him to impregnate her with her baby gold mine and decided enough was enough. She'll still be around though, even if she does eventually move out of the mansion: She's a photo editor for the magazine.

I hope this doesn't cause the end of the series, though some sources say season 5, the current season, is set to be the last, anyway. Others say Hef and the girls have signed on for season 6. Guess only time will tell.

The next tough question: Who will move into Hef's room? We can't imagine it would be either of the other two girls from the show, Bridget Marquardt and Kendra "K-Dub" Wilkinson.

I can't blame them, though. I wouldn't want that job, either.