Meryl Streep turned down 'The Devil Wears Prada' to try to double her salary. It taught her a lesson about negotiating.

Meryl Streep as Miranda Priestly in "The Devil Wears Prada."

20th Century Fox

• Meryl Streep revealed that she originally turned down her iconic role in "The Devil Wears Prada."
• Streep said she knew the film would be a hit, but felt she could leverage her demand for more money.
• "I wanted to see if I doubled my ask — and they went right away and said, 'Sure,'" Streep said.

Much like her iconic character Miranda Priestly, Meryl Streep knows her worth.

During...