Look: Hilary Duff expecting fourth child, her third with Matthew Koma

Hilary Duff is pregnant with her fourth child, her third with Matthew Koma. File Photo by Christine Chew/UPI
Hilary Duff is pregnant with her fourth child, her third with Matthew Koma. File Photo by Christine Chew/UPI
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Dec. 13 (UPI) -- Hilary Duff is going to be a mom of four.

The 36-year-old singer and actress is expecting her fourth child, her third with her husband, Matthew Koma.

Duff shared the news Tuesday on Instagram alongside her family's holiday card, which shows Duff holding her baby bump.

"Buckle up Buttercups, we're adding one more to this crazy bunch!" the card reads.

Hilary Duff attends the InStyle and Warner Bros. Golden Globes after-party in 2017. File Photo by David Silpa/UPI
Hilary Duff attends the InStyle and Warner Bros. Golden Globes after-party in 2017. File Photo by David Silpa/UPI

Actresses Mandy Moore, Lucy Hale and Jenna Dewan were among those to congratulate the couple in the comments.

Hilary Duff attends the iHeartRadio Music Awards in 2014. File Photo by Jim Ruymen/UPI
Hilary Duff attends the iHeartRadio Music Awards in 2014. File Photo by Jim Ruymen/UPI

"Love this. What a cute card!!" Moore wrote.

"Ahh Congrats you guys!" Hale added.

Hilary Duff attends the Los Angeles premiere of "Planes" in 2013. File Photo by Jim Ruymen/UPI
Hilary Duff attends the Los Angeles premiere of "Planes" in 2013. File Photo by Jim Ruymen/UPI

"Ahh congrats !!!" Dewan said.

Duff and Koma married in 2019 and have two children together, daughters Banks Violet, 5, and Mae James, 2. Duff also has a son, Luca, 11, with her ex-husband Mike Comrie.

Hilary Duff promotes the "Blessings in a Backpack" charity program in 2009. File Photo by Christine Chew/UPI
Hilary Duff promotes the "Blessings in a Backpack" charity program in 2009. File Photo by Christine Chew/UPI

Duff discussed her kids on Late Night with Seth Meyers in January, likening daughter Banks to a "unicorn."