Michelle Williams quietly welcomed 4th baby, her third with husband Thomas Kail

Michelle Williams is a mom of four.

The actress, 44, quietly welcomed her fourth child, and third with husband Thomas Kail.

Michelle Williams and Thomas Kail attend The 76th Annual Tony Awards. WireImage

The family was spotted in their New York neighborhood, with a source telling People that the couple welcomed their newest addition via surrogate six weeks ago.

“They couldn’t be happier to expand their family, and Matilda has been doting on her younger siblings,” the insider shared.

Williams is also mom to daughter Matilda, 18, with the late Heath Ledger and shares son Hart, 4, and a third baby born in 2022 with Kail, 48.

In 2023, the actress opened up to Entertainment Weekly about taking on her role in “The Fabelmans” after giving birth to her third child.

“My heart obviously belongs to my children; they tug at it the most,” Wiliams expressed at the time. “But I really want to be able to have both. And I think that it requires deep thought and learning and the support of other women to figure out how to get through it.”