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Hugh Hefner and Crystal Harris attend the Opening Night Gala of the newly restored "A Star Is Born" premiere at Grauman's Chinese Theatre on April 22, 2010 in Hollywood, California. (Photo by Michael Caulfield/WireImage)
Hugh Hefner's fiance was not bashful about flashing her new bling.
"When I gave Crystal the ring, she burst into tears," he wrote. "This is the happiest Christmas weekend in memory."
He later added: "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."
Hefner has been married twice before and even seemed surprised himself when he got engaged for a third time.
"I did not find frankly in marriage the romantic connection I was looking for so I really was not anticipating a marriage again," the 84-year-old Playboy founder told E! Online. "I'm essentially a romantic, and love is what it's all about, and marriage is not always consistent with romance."
As for his 60-year age difference between him and his wife-to-be, Hefner said he's always spent his time around younger people and wants to keep it that way.
"I think a relationship with a younger woman keeps you younger," he said.
Harris was Miss December for Playboy in 2009.
Selected Reading: E! Online