Known as “the best actress of her generation,” Meryl Streep has been in the film industry for more than 40 years. One of her best-known roles, especially for those who love fashion, is Miranda Priestly in The Devil Wears Prada. She is a fierce-tempered woman who can make anyone’s day a living hell. Quite the opposite character is Donna, who Streep plays in Mamma Mia!. Donna is a light-hearted mother—nearly a perfect example of a character full of positivity.