The 86-year-old married Harris, 26, in an intimate ceremony at his famous mansion on New Year’s Eve in front of family and close friends.
The Femme Fatale lingerie shop owner tweeted on Monday, "Today is the day I become Mrs. Hugh Hefner. Feeling very happy, lucky, and blessed.”
Hefner also took to his Twitter account to announce the happy news. "Crystal & I married on New Year's Eve in the Mansion with [brother] Keith as my Best Man. Love that girl!"
For her big day, Harris donned a floor-length mermaid-style soft pink strapless gown, while Hefner suited up in a black tuxedo.
[photo credit: Elayne Lodge/PEI]
The couple has had a rocky relationship. Crystal was dubbed "runaway bride" when she called off their engagement in June 2011, days before a scheduled wedding ceremony.