And according to Hollywood standards, the actor claims that makes her practically a teen mom.
The actress turns 40 next week and spoke about motherhood while making an appearance on "Live with Kelly and Ryan."
"I was like 12 when I [had him]...In terms of like a Hollywood actress, I was like a teen mom," she said on the morning show. "Me and Reese Witherspoon were like teen moms. We had kids really super young."
Hudson gave birth to her third child, a daughter named Rani Rose, with her boyfriend Danny Fujikawa in October.
The baby girl joins Ryder and her second son, Bingham Bellamy, 7, whom she had with her ex-fiancé and Muse frontman Matt Bellamy.
The "Bride Wars" star said she's exhausted and feels like she has "500 kids."
"Ryder's 15, which is crazy, I mean, it's like, I mean, he is almost, he's getting up to six feet and he's such a great boy, young man," Hudson confessed. "The other day we went to breakfast and I was juggling a million things and I think it's like, really wise to go alone with three kids."
"The next thing you know, I'm not eating, I'm juggling everything and I go to Ryder, [say] 'Just take Rani,' and I went to get my food at the buffet, and I looked over and here is this young man holding his sister," she said. "It was the craziest image to me."