Topic: Matthew Koma

Actress Hilary Duff gave birth to her fourth child Friday, she announced on social media on Tuesday.

Hilary Duff is pregnant with her fourth child, her third with Matthew Koma.

Hilary Duff discussed her three kids and "How I Met Your Father" Season 2 on "Late Night with Seth Meyers."

Christopher Mintz-Plasse, who played McLovin in "Superbad," announced his engagement to his girlfriend, Britt Bowman.

Hilary Duff posted a holiday card featuring her husband, Matthew Koma, and her three children, along with a wedding anniversary tribute to Koma.

Hilary Duff discusses what she has in common with her "How I Met Your Father" character, a struggling photographer looking for love, even though Duff is a working actor and mother of three.

Hilary Duff invited Mandy Moore, Ashley Tisdale, Meghan Trainor and other moms to attend a playdate with their young kids.

"Younger" star Hilary Duff shared a photo of Mae James, her newborn daughter with Matthew Koma, on Instagram.

"Younger" actress and "Lizzie McGuire" alum Hilary Duff has shared the first photo of her youngest child.

"Younger" actress and "Lizzie McGuire" alum Hilary Duff announced on Instagram that she has given birth to her third child.