49. Zoe Kravitz
Biggest accomplishment this year: Co-starring alongside Will and Jaden Smith in After Earth
While you may not know Kravitz especially well now (beyond her famous father Lenny), that isn't going to last. She'll be featured in the upcoming Smith family sci-fi film After Earth, but the name recognition will only start there. Next year, she'll appear in the first chapter of the dystopian saga Divergent, a Hunger Games-esque series of popular young adult novels that will be the next big thing a year from now. In the interim, Kravitz also put out a line of jewelry earlier this year in collaboration with Swarovski, using entirely her own designs. It wouldn't surprise us much if her father wears some of it, given his eclectic fashion sense.