LISA BONET & ZOË KRAVITZ

Just 21 when her daughter was born in 1988, the Cosby Show vet — then married to rocker Lenny Kravitz — has called becoming a mom the "wake-up call" she needed to grow up and be mature. "Zoe saved my life," she's said. "There were so many things I didn't want to pass on to her, so I really made a decision to change!'