Think all his money had anything to do with it?

Rico says nah, it's gotta be true love, right? Why else would a beautiful 24-year-old woman marry an 84-year-old guy, even one with a lifetime prescription for Viagra? People.com has the story:

Hugh Hefner rang in the holidays with an engagement ring. The Playboy founder is engaged to girlfriend Crystal Harris, 24. He announced the engagement on Twitter:

"After the movie tonight, Crystal & I exchanged gifts. I gave Crystal a ring. A truly memorable Christmas Eve," Hefner wrote. "When I gave Crystal the ring, she burst into tears. This is the happiest Christmas weekend in memory."
Later, he clarified: "Yes, the ring I gave Crystal is an engagement ring. I didn't mean to make a mystery out of it. A very merry Christmas to all."

This will be the third marriage for Hefner. In 2009 he filed for divorce from his second wife, former Playmate Kimberly Conrad, after the two separated in 1998. He was previously married to Mildred Williams; their marriage ended in divorce in 1959.
Harris was a Playboy Playmate in December of 2009.