Runaway bride Crystal Harris went through with her New Year's Eve plan to marry Hugh Hefner.

The 86-year-old Playboy founder and the 26-year-old Harris, a former Playmate of the Month, exchanged vows at the Playboy Mansion in Los Angeles on Monday. He confirmed the good news on Twitter.

According to People magazine, guests at the ceremony included KISS rocker Gene Simmons and wife Shannon Tweed, Rascal Flatts' Joe Don Rooney, and former Saturday Night Live cast member Jon Lovitz.

Early Tuesday, Hefner tweeted a picture of himself with his bride, writing, "Happy New Year from Mr. and Mrs. Hugh Hefner!"

Hefner and Harris initially got engaged in December of 2010, but she called off their wedding in June 2011, five days before they were to tie the knot. Hef announced last June that they'd reconciled, and their second engagement was revealed early last month.

This is Hefner's third marriage and Harris' first. He has two kids with each ex-wife.

I could care less about this couple but I wanted to share because I love her dress!

~Vanessa