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It's a boy for Kate Winslet.

The Oscar winning-actress, 38, and her husband, Ned Rocknroll, welcomed a son on Dec. 7 in Sussex County, UK, her rep confirmed to ABC News.

"Mother and baby are doing great," the rep said.

This is Winslet's first child with her husband of a year. She has two other children, Mia, 13, and Joe, 9, from previous marriages. Both of them live with her.

Kate Winslet Is Pregnant!

"Of course, they have lovely relationships with their dads, but they don't go and live with them for a week and come to me for a week and go to their dads for a week," she told Vogue magazine earlier this year. "They've always been with me. They don't go from pillar to post. They're not flown here and there with nannies. That's never happened."

She also refuses to hire a housekeeper or a cook to help her care for her family, though she acknowledged that she knows she could.

"I choose not to because that is not what I want my children to be exposed to," she said. "I remember my mother cooking, and that's being a parent, and that's what I want to do."