Event: "Winnie" Cocktail Party during the 63rd annual International Cannes Film Festival
In addition to signing on with Weight Watchers, Jennifer hired famed trainer Harley Pasternak to help her slim down to portray Winnie Mandela in "Winnie." She got great results from doing his five-day, 25-minute circuit workout. "Whatever it takes to morph into the character, I'll do it," she told People. By May, she fit into a size six.