Ashlee Simpson welcomes 3rd child, her 2nd with husband Evan Ross — see the pic!

Kerry Breen

Congratulations are in order for Ashlee Simpson Ross, who welcomed her third child, Ziggy Blu Ross, on Oct. 29, 2020.

The "Pieces of Me" singer announced the happy news on Saturday with an adorable snap of her bundle of joy.

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She wrote in the caption, "Ziggy Blu Ross. Our sweet boy has arrived! I'm over the MOON! We are so blessed."

This is Simpson Ross' second child with husband Evan Ross, whose mother is Motown legend and Grammy-winning singer Diana Ross. Their first child, daughter Jagger Snow Ross, is five years old.

Simpson Ross is also the mother of 11-year-old son Bronx Wentz, who she shares with ex-husband and Fall Out Boy bassist Pete Wentz.

The 36-year-old mom first shared the news of her pregnancy in April, when she posted a photo of herself holding up a positive pregnancy test on Instagram.

"We are pregnant and we are so excited to share it with everyone," she wrote at the time. In the caption, she also urged fans and followers to support March of Dimes' Mom and Baby COVID-19 Intervention and Support Fund, which helps "moms and babies get the care they need now and in the future."

In September, Simpson Ross celebrated her pregnancy during a sweet baby shower and posed for photos with several generations of her family, including daughter Jagger, sister Jessica Simpson, nieces Birdie Mae and Maxwell Drew Johnson, and mother Tina Simpson.

"I’m so grateful to be with my family as we get ready for my baby boy! Not long now!" Simpson wrote in an Instagram caption.

In 2016, the singer opened up to TODAY Parents about motherhood and offered advice to other moms.

"My advice to other moms would be to take every day one day at a time, especially with your kids so you can be present in each moment," Simpson Ross said. "Sometimes it's hard because life gets chaotic. It's about learning to take a deep breath, whether it's while you're cleaning or while your children are taking a nap, just doing a little something to relax and be able to focus."