5. Rita Hayworth

Rita Hayworth, the 1940s sensation, underwent a transformation that left her Spanish roots behind. To meet Hollywood’s standards, she became a redhead and underwent electrolysis to push back her hairline. Who knew the path to stardom involved a hairpin’s twist and a jolt of electricity?

6. Clark Gable

Clark Gable’s iconic grin wasn’t always camera-ready. It turns out his natural smile wasn’t Hollywood-perfect. Thanks to his acting coach Josephine Dillon, Clark got himself a shiny new set of teeth. Dental hygiene and an age gap were the ingredients for a uniquely romantic Hollywood tale.

7. Jean Harlow

Before Marilyn, there was Jean Harlow, the ideal platinum blonde. But her striking hair color was a result of a toxic mixture involving bleach, peroxide, ammonia, and laundry detergent. Her hair may have dazzled, but the risks were far from glamorous.