Meryl Streep

The 'Mamma Mia!' star has won three Academy Awards in her time as one of Hollywood's most famous leading ladies but only relied on method acting to portray the role of the formidable fashion editor Miranda Priestly in 'The Devil Wars Prada'. But living as the character - who is said to have been inspired by Vogue editor Anna Wintour - left her so "miserable", she vowed never to go back to method acting. She said: "I was [miserable] in my trailer. I could hear them all rocking and laughing. I was so depressed! I said, ‘Well, it’s the price you pay for being boss!’ That’s the last time I ever attempted a Method thing!”