Mia Farrow could have been a bigger star, but she chose motherhood, and for that, we give her props. Still, Farrow isn't exactly anonymous—she starred in The Great Gatsby (from 1974, not the modern, disjointed one with the hip-hop soundtrack) and Woody Allen's The Purple Rose of Cairo and Hannah and Her Sisters.
Farrow's best performance was in the horror classic Rosemary's Baby. In director Roman Polanski's creep-out classic, Farrow plays Rosemary Woodhouse, a married women who becomes pregnant and struggles to protect her unborn child against the Satanists living in her high-rise NYC building. The film fared surprisingly well at the Academy Awards despite being a horror film, but Farrow didn't even get the nomination for Best Actress.