8. Renee Zellweger – ‘Bridget Jones’s Diary’
Renee Zellweger’s transformation into Bridget Jones required more than just a change of accent. The slim actress gained 25 pounds for her role in “Bridget Jones’s Diary” in 2001, lost it all for her role in “Chicago” in 2002, and then regained it all for “Bridget Jones: The Edge of Reason” in 2004. Talk about dedication!
7. Colin Farrell – ‘The Batman’
In 2020, photographs surfaced of Colin Farrell using prosthetics, transforming him into the villainous Oswald Cobblepot, best known as the Penguin, while filming “The Batman” in Liverpool, England. He starred alongside Robert Pattinson as the title superhero and Zoe Kravitz as Catwoman.