Ashlee Simpson is expecting her first child with new husband Evan Ross and the mum-to-be was surrounded by her closest friends and family members as they marked the occasion with a party at her older sister's Los Angeles home.

A source tells, "It was beautiful weather and her house was the perfect setting... so gorgeous.

"It was very chill and almost like just a get-together than a traditional shower. It wasn't focused on games (and was) more like a big party."

Ashlee, 30, wed Diana Ross' actor/singer son last August (14).

She is also mum to six-year-old boy Bronx Mowgli, with her ex-husband Pete Wentz, who she divorced in 2011.