Can you believe America's little sweetheart is now a budding 16-year-old bona fide movie star? We can't either! Seems like just yesterday Dakota Fanning was Sean Penn's cute little gap-toothed daughter in 'I Am Sam' or the late Brittany Murphy's greatest challenge in 2003's 'Uptown Girls'.

So how has this child star slowly but surely become one of Hollywood's greatest and prolific talents? Read the full story after the jump.