When these stars put family first, it changed their lives. It was a dream come true for Amanda Seyfried when she danced into the arms of her long lost father in the musical "Mamma Mia." Funny man, Steve Martin raised more than his profile as a workaholic dad in "Parenthood." And when he took an unexpected turn in the family-friendly "Are We There Yet?" Ice Cube didn't lose his cool.—Jason Lewis