An adorable child star who overcame an out-of-control adolescence and reclaimed her post as America's mischievous but pure-hearted sweetheart, Drew Barrymore rode a career rollercoaster spanning two decades before the age of 25. The product of an acting dynasty that runs from great-great-grandmother Louisa Lane Drew through grandfather John Barrymore, the youngest Barrymore showed promise from the start, appearing in commercials before the age of one. While her lineage was responsible for some notice, the saccharine-free sweetness of her performance as little Gertie in the 1982 classic "ET,