Hugh Hefner's Fiancee Shows Off Engagement Ring

If the size of the diamond is any indication of Hugh Hefner's love for bride-to-be Crystal Harris, it's a safe bet to say that he's head over heels.

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Harris revealed her engagement ring on Tuesday, via her Twitter feed.

"My beautiful ring from [Hugh Hefner]," Crystal posted along with photos of the giant sparkler.

The couple is reportedly planning to wed on New Year's Eve.