Hugh Hefner and Crystal Harris have called off their wedding.
"The wedding is off," Hefner, 85, tweeted Tuesday. "Crystal has had a change of heart."
After getting engaged on Christmas Eve last year, the Playboy founder and Playmate reportedly had an argument over the weekend; according to TMZ, Harris moved out of the Playboy mansion and canceled Saturday's nuptials.
UPDATE: Harris' rep, Michael Blakey, "spoke to Crystal earlier this morning and she had shared the sad news with me," he tells Us Weekly. ...