 | | 5 / 7 Renee Zellweger
She's famous for her yo-yo weight but when she's not bulking up to play Bridget Jones, Renee Zellweger looks gaunt. She reportedly used the Atkins diet to shed extra pounds after the first Bridget Jones movie. The second time around, she was rumored to eat tuna and cold meats coupled with raw vegetables and dressing-free salads, along with rigorous sessions in the gym. The latter appears to still be a key part of her routine as the actress was snapped on what looked like a vigorous run around the streets of Paris on a recent visit to the city. Unofficial sources suggest that Renee whose height is 5' 4" (1.63 m) falls into the underweight BMI category of less than 18.5.
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