Playboy founder Hugh Hefner said on Tuesday his wedding this weekend has been cancelled because his girlfriend, a Playmate from his magazine, changed her mind.
"The wedding is off. Crystal has had a change of heart," Hefner wrote on Twitter.
News of the split was first reported by TMZ, which said the couple had "a nasty argument" on the phone over the weekend and Harris moved out of the mansion.
Hefner's publicist was not immediately available for comment.