1. Christian Bale:
- _"American Psycho" _(2000)_: Gained 45 pounds of muscle to achieve the iconic ripped physique of Patrick Bateman.
- _"Vice" _(2018)_: Gained 40 pounds to portray former U.S. Vice President Dick Cheney.
2. Jared Leto:
- _"Chapter 27" _(2007)_: Gained 67 pounds to transform into Mark David Chapman, John Lennon's assassin.
3. Robert De Niro:
- _"Raging Bull" _(1980)_: Gained 60 pounds to play the aging boxer Jake LaMotta.
- _"The King of Comedy" _(1982)_: Gained 40 pounds to embody the overweight and insecure aspiring comedian Rupert Pupkin.
4. Vincent D'Onofrio:
- _"Full Metal Jacket" _(1987)_: Gained 70 pounds to play the intimidating drill sergeant, Gunnery Sergeant Hartman.
5. Renee Zellweger:
- _"Bridget Jones's Diary" _(2001)_: Gained 20 pounds to embody the relatable and charming Bridget Jones.
6. Matt Damon:
- _"The Informant!" _(2009)_: Gained 30 pounds to portray the overweight pharmaceutical sales representative Mark Whitacre.
7. John Goodman:
- _"O Brother, Where Art Thou?" _(2000)_: Gained 80 pounds to play the easygoing conman Big Dan Teague.
8. Nicole Kidman:
- _"The Hours" _(2002)_: Gained 20 pounds to portray Virginia Woolf, who struggled with mental health issues and weight fluctuations.
9. Tom Hardy:
- _"Legend" _(2015)_: Gained 30 pounds to play both of the notorious Kray twins simultaneously.
10. Ryan Reynolds:
- _"Free Guy" _(2021)_: Gained 20 pounds of muscle to achieve the action hero physique of Guy, a non-playable character (NPC) in a video game.