- Photo: AP/WireImage7 of 17
Mary-Kate and Ashley Olsen
Child star claim to fame: starring on "Full House" at only a year old
Why they're successful now: Though only Mary-Kate still acts, the Olsen twins get a nod for building a small media empire in their younger years (with those endless "Mary-Kate & Ashley" movies) and for being known today as little fashion icons, always ready to show off high-end duds on the red carpet.
From Crowd Ignite