The “This is 40” star showed off her tiny post-baby body on the March cover of Marie Claire U.K. just four months after giving birth to her son, Noah Green.
Fox says that while she is thankful for her career, she has never received the kind of satisfaction that she has from caring for her baby.
"I've never been validated by work or fame or Hollywood or any of that. I recognize the blessings when they come –- like, I recognize I'm so lucky to work with Judd [Apatow]. But the ultimate satisfaction for me is being with my son," she said.
The raven-hared beauty welcomed her son with husband Brian Austin Green in September 2012, Us Weekly notes.
"All I wanted to do my whole, whole life was have a baby and, now, I've finally done it," she said.
"I just want to give Noah as much of myself as I can. And I want to have more kids. That is where my heart is."
The coupled married in June 2010.
"I just think we got lucky," she says of marrying the "Wedding Band" actor. "I believe he's my soulmate."
"But that doesn't mean it doesn't take work, because we are very, very different," Fox admits. "But we are tolerant of each other and we try to be patient with each other, and I don't try to turn him into me and he knows not to try to turn me into him. He really is amazing. I should never, ever even think about complaining."