10. Christian Bale Learned the Piano for The Machinist
Christian Bale’s commitment to roles is legendary, and for The Machinist, he pushed boundaries even further. Bale lost an extreme amount of weight to portray a man suffering from severe insomnia, and he also learned to play the piano for key scenes that reveal his character’s psychological unraveling.
This combination of physical and artistic transformation helped Bale deliver one of the most haunting and immersive performances of his career.