Hugh Hefner & Crystal Harris We're Getting Married! (For Reals This Time)

12/2/2012 3:10 AM PST

Hugh Hefner & Crystal Harris Engaged Again -- We're Getting Married!

Playboy mogul Hugh Hefner is engaged (again) to Crystal Harris (again) and the two will walk down the aisle at the Playboy Mansion on New Year's Eve (oooh, that's new!) ... TMZ has learned.

As TMZ first reported, Harris bailed on wedding #1 in June 2011 ... just five days before the big day. 

But according to our sources, Harris and Hef are better than ever these days, since Harris moved back into the Playboy Mansion earlier this year. We're told the couple have worked out all their previous problems and decided recently they want to try and get married again.

According to our sources, Harris feels the time she spent apart from Hef really taught her how to be independent and stand on her own two feet ... something she felt she needed.

Our sources say the wedding will be an intimate gathering with just close friends and family.

Clothing optional.