Playboy founder Hugh Hefner is off the market, again.

The 86-year-old married former Playmate Crystal Harris, 26, on New Year's Eve in a small ceremony captured on Twitter.

Harris, who officially changed her last name on Twitter to Hefner, started dating the media mogul in January 2009. The couple were first engaged on June 14, 2011, but it was called off by Harris after rumors circulated that she was secretly dating the son of TV personality Dr. Phil.

Hefner and Harris ultimately reunited almost a year later.

"Today is the day I become Mrs. Hugh Hefner," Harris tweeted Monday night. "Feeling very happy, lucky, and blessed."

This is Hefner's third marriage.

Harris and Hefner posted the following photos on Twitter from the ceremony at the Playboy mansion.

All photos via Hugh and Crystal Hefner/Twitter