6. Keanu Reeves Became a Martial Artist for John Wick

Keanu Reeves’s role as John Wick redefined modern action heroes, largely due to his intense martial arts training. Reeves studied judo, jiu-jitsu, and weapons handling for months, performing nearly all of his own stunts.
This hands-on approach gave the action sequences an impressive realism and fluidity rarely seen in Hollywood, turning John Wick into a beloved franchise known for its expertly choreographed fights.