Hugh Hefner's bride-to-be Crystal Harris has called off the couple's impending nuptials and moved out of the Playboy mansion - five days before the couple was due to wed, according to a report.

The publishing mogul, 84, proposed to Harris on Christmas Day and was set to exchange vows with the 24 year old on Saturday.

However, according to TMZ.com, his fiancée has had second thoughts about marrying Hefner after the couple became embroiled in a heated argument over the phone over the weekend.

The website claims Harris promptly moved her belongings out of Hefner's famous Los Angeles estate.
 
A representative for Hefner has yet to comment on the report.