(Cover) - EN Showbiz - Hugh Hefner is set to marry Crystal Harris in June.

The founder of Playboy magazine will tie the knot with his 24-year-old girlfriend Crystal at the Playboy Mansion on June 18, with a representative from the publication confirming the date.

No further details about the nuptials have been released, although there is speculation about the event.

An insider tells UsMagazine.com they couple will have less than 300 guests and that Crystal, 24, is close to choosing her gown for the big day. The Playmate - whose engagement ring cost $90,000 - is considering a strapless wedding dress by designer Romona Keveza.

"It will be intimate with a close number of friends here at the mansion," Hugh has said of the nuptials. "No big blowout affair. Something very personal."

The 84-year-old is notorious for his relationships. He married Mildred Williams in 1949 and they had two children together, Christie and David. The couple divorced in 1959.

Hugh had a minor stroke in 1985 at age 59 and after re-evaluating things and calming down his playboy lifestyle, he married Playmate of the Year Kimberley Conrad.

Things didnt work out and after an 11-year separation, Hugh filed for divorce stating irreconcilable differences. It was finalised in March 2010.

Hugh had an ever-changing coterie of young women in the Playboy Mansion, even dating up to seven girls at once - among them, Holly Madison, Bridget Marquardt and Kendra Wilkinson.

Hugh began dating his new Number One girlfriend and soonto-be wife Crystal Harris. On December 24, 2010, after almost two years of dating, Hugh proposed. (C) Cover Media