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Jennifer Garner

After the birth of her second daughter, Garner took her time getting back into pre-baby shape, her long-time trainer told People in October, 2009; she started exercising again three weeks after baby Serafina arrived, but took her time and spent nine months getting back to her pre-baby body. When Garner's first son was born in February, 2012, however, she seemed more anxious to get back in shape and into the spotlight. Just two months after Samuel's birth, Garner wowed the media at her first postpartum red-carpet appearance, at CinemaCon in Las Vegas.

Next: Milla Jovovich