Ashlee Simpson and Evan Ross wed at estate of his mom, Diana Ross

Ashlee Simpson and Evan Ross have made it official: They’re now man and wife.

Simpson, the younger sister of crooner-designer Jessica Simpson, and Ross, the son of legendary Supremes singer Diana Ross, got hitched on Sunday night at his mom’s estate in Greenwich, Conn., Us Weekly reported.

The 29-year-old songstress wore a long-sleeved lace wedding dress comprised of a lace crop top and full skirt, as seen in snapshots obtained by Yahoo! Celebrity. The bohemian look was embellished with pearls and a bevy of Neil Lane jewelry -- rubies, diamonds and a tiara rather than a veil -- reportedly worth $750,000, Us Weekly said. Simpson’s engagement ring was also made by the famed jeweler.

Ross, 26, wore a black velvet tux trimmed with white silk and a hat.

The event was a family affair: Diana Ross, 70, officiated the ceremony and performed, newlywed Jessica Simpson served as matron of honor and Ashlee’s 5-year-old son, Bronx, walked his mom down the aisle, E! News reported

Jessica Simpson’s kids were also part of the festivities. Her daughter Maxwell, 2, was the flower girl, and son Ace, 14 months, was the ring bearer, while hubby Eric Johnson shouldered some groomsman duties.

The bridesmaids also wore different white boho frocks and headpieces. They reportedly stepped into shoes from Jessica Simpson’s footwear collection, and Ross’ half-sister Tracee Ellis Ross was the event’s emcee, the reports said.

The outdoor wedding was off to a later start than expected due to rain, but ultimately “went perfectly,” Diana Ross told the Insider With Yahoo.

“We had a beautiful rainbow surrounding us, loving family and friends, great music, great speeches from caring friends, and joyful children dancing the night away,” she said. “Wishing Evan and Ashlee congratulations. I want only love, happiness, joy for my son and his bride.”

Other celebrity guests included Cacee Cobb, who was a bridesmaid, her husband Donald Faison, singer Brandy and music producer Diddy.

Simpson’s dad, Joe Simpson, posted a filtered portrait of his younger daughter on Instagram Sunday bearing the caption, “Ashlee got married tonight.”

The “Hunger Games: Mockingjay” actor announced his engagement to the “Pieces of Me” singer in January. The two were longtime friends, then dated for less than a year before becoming affianced.

“The love of my life said YES!!!!!!,” the “90210” actor wrote in a tweet at the time.

“My baby love and I are ENGAGED!!! Hallelujah Hawaii !!!!!,” Ashlee Simpson tweeted, captioning a rather serious but still romantic picture of herself with her new fiance.

After the proposal, the couple was feted in March with a lavish engagement party at mom Tina Simpson’s house and then a bohemian bridal shower at sister Jessica Simpson’s home in L.A., People reported.

It’s the first marriage for Ross and the second for Simpson: She was previously wed to Bronx’s dad, Fall Out Boy musician Pete Wentz. The pair divorced in 2011 after nearly three years of marriage.

Incidentally, Wentz welcomed his second child, a boy named Saint Laszlo Wentz, last month with girlfriend Meagan Camper.

For more on the Labor Day weekend celebrity wedding extravaganza, follow me on Twitter @NardineSaad.