1 / 7Well known as Mr. Perfectionist, Aamir Khan underwent a remarkable transformation for Dangal. He not only lost weight and achieved a well-chiseled physique but also gained weight drastically to portray the older version of his character. It’s truly commendable how he went through two completely different physical transformations for a single role, pushing his body to its limits.2 / 7The heartthrob Vijay Deverakonda is known for his on-screen charm. But for his upcoming film Kingdom, the actor adopted a buzz cut and has maintained it consistently. While he's brought the buzz cut trend back in style, it's impressive how long he has retained the look just to stay immersed in the character for months.3 / 7Hrithik Roshan has always been a fitness icon, and he’s continuing that legacy with WAR 2. Known for his stunning physicality in WAR, Hrithik has once again amazed fans by undergoing a major weight loss for the sequel, proving his commitment to every role.4 / 7For Kaminey, Shahid Kapoor achieved a ripped, lean body with six-pack abs. Later, for Kabir Singh, he had to portray a journey from a college boy to an alcohol addict, which required him to gain 8 kg and then lose 14 kg, all within a few months. It’s a testament to his discipline and dedication.5 / 7For his role as Igor in Victor Frankenstein, Daniel Radcliffe went through a notable hair transformation. He wore hair extensions to match the character’s distinctive look — a process he found stressful and time-consuming, but crucial for authenticity.6 / 7Tom Hiddleston personally transformed himself to embody Loki’s signature look in both seasons of the Loki series. Naturally a lighter, curly blonde, he dyed his hair a darker shade and grew it out, using gel to create the iconic, layered, and slightly spiky “Christmas tree” style. This look not only defined Loki visually but also mirrored the character’s evolution and maturity.7 / 7Hollywood actor Chris Hemsworth took on a diet program called 'Lost At Sea' for his film In the Heart of the Sea. He lost a shocking amount of weight, transforming from his usual muscular build to a much leaner frame. The transformation was extreme and showed a different side of his commitment to acting.