Renee Zellweger
For Zellweger's first appearance in Bridget Jones's Diary, she was required to pack on 30 pounds to hold her role. Immediately afterward, she adjusted her diet and lifestyle to get back to her preferred weight. So, when the sequel, Edge of Reason, was teased, Zellweger had to pack on another 30 to keep things looking authentic...
It's Harder Than it Looks
Zellweger did her best to pack on and keep on all the weight that she promised to gain. She and the crew she was working with made it a point to sample all of the burger places around their studio in LA. But, Zellweger's demanding shoot schedule seemed to make it more difficult to hang onto the weight she put on. All the time she spent on her feet burned so many calories that her crew, at some points, had to put pads under her clothing for continuity's sake.