If you had some romantic notion that Hugh Hefner, 86, and Crystal Harris, 26, are so in love that they tied the knot sans prenup, think again. They signed one three weeks ago, a source tells Radar. The agreement protects Hef's assets from Playboy, and requires Harris to leave the Playboy Mansion if they divorce—or after Hef's death. She "has no legal rights to the iconic Holmby Hills estate," the source says. Click to see the first photo of the couple as man and wife.