December 18, 2014 05:30 PM

Barry King/FilmMagic

First comes marriage — and soon a baby carriage!

Ashlee Simpson is expecting her first child with her husband, singer/actor Evan Ross, a source confirms to PEOPLE.

Simpson, 30, is already mom to 6-year-old Bronx Mowgli, her son with ex-husband Pete Wentz.

The couple, who dated for over a year, tied the knot in August during a family-focused ceremony in Connecticut, where Simpson’s big sister, Jessica, served as matron of honor.

After their bohemian-style nuptials, they were spotted soaking up the sun on their honeymoon in Bali.

“I’m so in love and we’ve got amazing things going on. We inspire each other,” The Hunger Games:Mockingjay star told PEOPLE of Simpson in 2013.

Ross, 26, the son of legendary singer Diana Ross, recently released the music video for his single, “How to Live Alone” — starring his newlywed wife! — but it’s clear he’ll soon be singing a different tune.

E! News was the first to report the pregnancy.

— Anya Leon with reporting by Jennifer Garcia

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