Mary-Louise Parker

The Weeds star -- who split from actor Billy Crudup in 2003 when she was pregnant with their son, Will -- didn't expect to be a single mother, but rises to the challenge. "I don't think in terms of 'oh if my life were...' That's not good for them" Parker, who adopted daughter Caroline Aberash Parker in 2007, has said. "Your children suffer when you have one foot in the past."