Ashlee Simpson and Evan Ross announced their engagement in January

Ashlee Simpson and Evan Ross, who announced their engagement in January, threw a party for friends and family to celebrate last weekend.

Ashlee Simpson & Evan Ross Engagement Party

Simpson, 29, and Evan, 25, hosted the party at a private residence in Toluca Lake, Calif., reported E! Online. The intimate affair was reserved for close friends and family members of the couple, including Jessica Simpson and Diana Ross. Providing the music for the party was The Ellis Hall Band.

"It was small, intimate, just close friends and family," an insider told E!

Simpson shared a romantic picture taken of Evan and her at the engagement gala, in which she’s shown decked out in a white feather headdress. Not to be outdone in the fashion department, her husband-to-be was wearing a short-sleeved white fur coat.

“What an amazing engagement party with all of our loved ones!” Simpson captioned the snap. “We gettin’ married.”

Jessica Simpson took to Instagram to post a picture of her with her engaged sister. “Celebrating my best friend and sister @missbananahammock @ashleesimpsonofficial,” she wrote. “I love her so much!”

Back in January, both Simpson and Ross gleefully shared their engagement news on Twitter with a picture of the two in Hawaii (top). The two had been publically dating since July, when Simpson was spotted heading to an after party with the up-and-coming actor following his mother Diana Ross’ Los Angeles concert.

Simpson was previously married to Fall Out Boy’s Pete Wentz, with whom she has son Bronx, 5. This will be the first marriage for Ross.

– Chelsea Regan

For More Ashley Simpson News:

> Pete Wentz And Girlfriend Meagan Camper Announce Pregnancy

> Ashlee Simpson Engaged To Evan Ross

> Ashlee Simpson Parties With Boyfriend’s Family, Meets Diana Ross

> Ashlee Simpson Dating Diana Ross’ Son Evan Ross?