Half Their Size: Celeb Edition!

These stars embraced slimmer silhouettes for new roles, onscreen and off

PETER JACKSON

Was it the excitement or his extra weight that left the Lord of the Rings director panting when he won 2004's Best Picture Oscar? On his King Kong shoot, Jackson skipped the catering truck for yogurt, muesli or soup, and in time off, used a home gym. The result? A more than 70-lb. loss.