According to Us Magazine, the Saturday-evening wedding was winter-themed and took place at the Beverly Hills home of Richie's adopted father, iconic pop star Lionel Richie.
The 29-year-old bride and mother of almost 3-year-old daughter Harlow (the flowergirl) and 1-year-old son Sparrow wore a dreamy Marchesa gown, and the couple exchanged wedding bands by Neil Lane, who also designed Richie's whopping 4-carat engagement ring.
The two were married in front of approximately 150 guests by rapper-preacher Rev. Run from Run DMC. Other celebs in attendance included Gwen Stefani, Gavin Rossdale, Khloe Kardashian, Kris Jenner, Samantha Ronson, Ashlee Simpson and, of course, the 31-year-old groom's twin brother and best man, Benji Madden. Masha Gordon was Richie's maid of honor.
Notably absent were Kim Kardashian, who was spotted by the paparazzi in Miami, and Richie's former BFF Paris Hilton, who sources say was not invited.
While no photos of the affair have been leaked yet (the images have supposedly sparked a bidding war in the $100,000 range between tabloids), pictures of an elephant arriving at the ceremony are circulating the Internet.
And while an elephant has seemingly little in common with a classic winter themed event, we suppose, why not?
Congrats to the happy couple!
In related news: hear the details of Katy Perry's lush Indian wedding, also involving an elephant.
Love Nicole Richie's style? Click here for her 10 best looks.