The Bridget Jones trilogy saw Zellweger gain 30 pounds, transitioning her from a svelte actress to a relatable leading lady.
Renee Zellweger
From the leaner side, Hardy bulked up significantly for his roles in "Bronson" and "The Dark Knight Rises," adding both muscle and mass to embody his characters.
Tom Hardy
Transitioning from slim to muscular, Reynolds added 25 pounds for "Blade: Trinity," showcasing the transformative power of tailored workouts and diets.
Ryan Reynolds
Gyllenhaal's body transformations for "Prince of Persia," "Nightcrawler," and "Southpaw" demonstrate his commitment to physical authenticity across diverse roles.
Jake Gyllenhaal
Bale's dramatic weight fluctuations, from emaciated in "The Machinist" to muscular in "Batman" and potbellied in "American Hustle," underscore his versatility and dedication.
Christian Bale
Aniston's departure from her usual image in "Cake" showcased her commitment to portraying complex characters, despite the physical toll.
Jennifer Aniston
Smith's transformation for "Ali" proves his dedication, with 35 pounds of muscle gain over almost a year to embody the legendary boxer.
Will Smith
Jordan's rigorous training regimen for "Creed" exemplifies the discipline required to portray a convincing boxer on screen.
Michael B. Jordan
D'Onofrio's candid reflections on the emotional toll of gaining 70 pounds for "Full Metal Jacket" highlight the sacrifices actors make for their craft.
Vincent D'Onofrio