Here's why:
* Physical Transformation: Theron gained weight, altered her teeth, and wore prosthetics to change her appearance. She also spent months learning Wuornos' mannerisms and speech patterns.
* Emotional Depth: The film focused on the emotional journey of Wuornos, capturing her vulnerability, anger, and desperation. Theron's performance showcased the complexities of Wuornos' character, humanizing her without justifying her actions.
* Critical Acclaim: Theron's performance was universally praised and earned her numerous accolades, including an Academy Award for Best Actress.
While physical resemblance is a part of any transformation, Theron's dedication to understanding and portraying Wuornos on a deeper level made her performance so impactful.