The 86 year old publishing tycoon and 26-year-old Harris exchanged vows at the Playboy Mansion in Beverly Hills, California on Monday (31Dec12).
The excited bride kept fans updated about her big day with posts on Twitter.com; in one she wrote, "Today is the day I become Mrs. Hugh Hefner. Feeling very happy, lucky, and blessed."
She also uploaded a picture of staffers setting up the altar, alongside a caption which read, "The mansion is looking beautiful #weddingbells".
Hefner and Harris were originally set to walk down the aisle last year (Jun11), but the model-turned-lingerie store owner got cold feet and called off the wedding. They reconciled in May (12) and Hefner proposed again earlier this month (Dec12), announcing he was planning to ring in 2013 as a married man.
This is his third marriage - he was married to Mildred Williams from 1949 to 1959, and he wed Kimberley Conrad in 1989. The couple divorced in 2010.