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Jane Kaczmarek

Jane Kaczmarek's daughter Mary Louisa: 10 pounds, 3 ounces
Actress Jane Kaczmarek was already a pro at parenthood when she gave birth to her third child, Mary Louisa Whitford (with then-husband Bradley Whitford), in 2002. After all, the actress, almost 47 at the time, had tons of experience playing mom to a bunch of rambunctious boys on “Malcolm in the Middle” and had two kids of her own at home. But she might not have been prepared for the fact her little girl would tip the scales at 10 pounds, 3 ounces. Kaczmarek gained a whopping 70 pounds during all three of her pregnancies. “For me, there’s a big difference between having a baby in your 20s and having a baby in your 40s,” she told Fit Pregnancy before she gave birth. "When you’re pregnant in your 40s, you do not want to wear thongs."

Biggest Celebrity Babies

Jessica Simpson's nearly 10-pound daughter Maxwell may seem large, but there have been other famous offspring before her who also tipped the scales.