Growing up in California, it's not that big a surprise that twins Mary-Kate and Ashley got into show business, but they landed the role of Michelle Tanner before they were even old enough to realize what was going on. At the audition, they were the only twins that didn't cry, and that was enough for the people at Full House. After an eight year run as one of the most popular shows on TV, Mary-Kate and Ashley were two of Hollywood's most loved stars.