17) Tom Hanks in Cast Away
The movie Cast Away was based on the journey of a delivery agent, who after a plane crash is stuck all alone on an island with no means of survival. To perfect his role, Tom Hanks took extensive training in outdoor survival skills. He not only learned how to make fire and adapted various techniques of fishing, but also took a physically transformative journey by losing 50 pounds, growing a beard and long hair. He isolated himself from people to genuinely portray loneliness and it also ended up taking a toll on his mental health.
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Edited by Mudeet Arora