Us Weekly:

Nicole Richie and her boyfriend of four years, Joel Madden, said "I do" in a winter-themed ceremony Saturday in Beverly Hills, UsMagazine.com has confirmed.

Held at the home of Nicole's father, Lionel, the black-tie evening event was attended by approximately 150 family members and friends, including Khloe Kardashian and Samantha Ronson. Richie's childhood pal Kardashian, 26, Tweeted from the bash: "I love weddings!"

Officiating the ceremony was none other than Run-DMC rapper and reality star Rev. Run, a wedding guest tells Us exclusively. The hip-hop pioneer (real name: Joseph Simmons), 46, is also an ordained minister. The couple "have looked up to Rev. Run, so they wanted him to officiate," the guest explains.



One other guest: an elephant! Around 5:40 p.m., observers spotted an elephant arriving in the driveway; the animal was led into a white tent with other revelers.

The bride's BFF, Masha Gordon, served as maid of honor, while the couple's 2-year-old daughter, Harlow, was the flower girl.