8 Talented and Beautiful Hollywood Stars Who Put Aside Their Egos For Unattractive Roles (2 of 5)

Charlize Theron as Aileen Wuornos in “Monster”

Charlize Theron is plenty easy on the eyes, but it isn’t her beauty that led to her winning an Oscar; rather, it was her complete dedication to her craft. In the case of “Monster,” the biographical crime drama about real-life female serial killer Aileen Wuornos, Theron didn’t merely throw some makeup on herself to look like a strung out, murdering prostitute. She actually gained 30lb (14kg) to ensure the portrayal was as authentic as possible.

Blake Lively as Stephanie Patrick in “Rhythm Section”

Let’s not sugarcoat things: this movie was craptastic. A complete box office bomb. In fact, it holds the record for the worst box office opening for any film playing on at least 3,000 screens. That said, Blake Lively did a mighty fine job of transforming herself from the gorgeous girl with cascading blonde hair to a bland brunette who becomes an assassin determined to get revenge on the dirtbags who staged a plane crash that took out her family.