Scarlett Johansson started her career as a child actress in the film North (1994) before becoming one of the highest-paid actresses in the world. To prepare for her role as Black Widow, she underwent intense training in Mixed Martial Arts (MMA), including Brazilian Jiu-Jitsu, Boxing, and Wrestling. She wasn’t the first choice for Natasha Romanoff in Iron Man 2. She landed the role only after Emily Blunt had to drop out due to a scheduling conflict. Scarlett holds the record for the highest-grossing female box-office star of all time, with her films earning over $15.4 billion worldwide.