It's hard to believe that anyone could look at Jessica Chastain and say she's "not pretty enough" for a part, but the "A Most Violent Year" star tells Telegraph magazine that was the case when her acting career began.

"Only in the past five years have people been telling me I'm attractive," Chastain admitted. "Before then, I wasn't getting parts because people kept telling me I wasn't pretty enough."

PHOTOS: Jessica Chastain Leads Cleavage Trend at 2015 Golden Globes

The 37-year-old actress was even told to get rid of her trademark red hair.

WATCH: Shannen Doherty on 'Charmed': 'Let it be'

More On This...

"People would tell me to dye my hair blond when I first started auditioning," she said. "Funny how defined we are by how we present ourselves."

WATCH: Shannen Doherty on 'Charmed': 'Let it be'