Update, 4 p.m. ET: In a message on Playboy's official Twitter feed, Hugh Hefner said that Crystal Harris has "had a change of heart."
Update, 3 p.m. ET: Over at Radar Online, the exclusive word is that Harris is dating Dr. Phil's son, Jordan McGraw.
If you bought Hugh Hefner and Crystal Harris a wedding gift, might want to check on the return policy.
TMZ is reporting that the couple's Saturday nuptials at the Playboy mansion have been called off. Sources at the mansion tell the website that the two had a nasty argument over the weekend, and ultimately Crystal decided to call off the wedding and moved her things out.
This would have been Hefner's third marriage. The two became engaged last Christmas, when Hefner, 85, presented Harris, 24, with an engagement ring, encased in a "Little Mermaid" box.
Reuters reports that a two-hour special featuring wedding highlights was due to air July 13 on the women's cable channel Lifetime.
Hefner was divorced from his second wife, Kimberley Conrad, in 2010 after a lengthy separation. His first marriage to Mildred Williams ended in divorce in 1959. He has two children from each marriage.