Hugh Hefner Ties the Knot!

It's official! Hugh Hefner married Crystal Harris in an intimate ceremony on New Year's Eve...

ET confirms that the 86-year-old Playboy founder and his 26-year-old model girlfriend were married at the Playboy Mansion in Los Angeles.

Related: Hugh Hefner's Fiancee Shows Off Engagement Ring

Harris wore a stunning bridal gown by designer Romona Keveza -- a blush mermaid gown made of silk organza, featuring a fitted draped bodice, a dropped waist and a fluted-shaped skirt made of soft silk organza petals.

The ceremony was followed by a private reception where they toasted with champagne and cut the wedding cake. Later in the evening, the newlyweds greeted well wishers at the Mansion’s annual New Year’s Eve celebration. The party décor was an Art Deco styled nightclub with crowd pleasing performances by vintage jazz and blues singer Brenna Whitaker and her band. Celebrity guests included Joe Don Rooney of Rascal Flatts with wife, 2005’s Playmate of the Year, Tiffany Fallon, Baseball superstar Evan Longoria with girlfriend and Playmate Jaime Edmondson, Gene Simmons with wife and Playmate Shannon Tweed and Jon Lovitz.

Harris was nicknamed the "Runaway Bride" for calling off the couple's first attempt at a wedding just days before the ceremony in June of 2011. The couple announced their engagement in December 2010.

This is the third marriage for the Playboy mogul, who first married Mildred Williams in 1949 and then wed Kimberley Conrad in 1989.