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She’s growing up and changing right before our very eyes!

PHOTOS: Celeb hair makeovers 

Elle Fanning debuted a mature and sophisticated look for "The Boxtrolls" premiere in Los Angeles on Sunday, Sept. 21. The "Maleficent" actress, 16, ditched her long platinum blonde tresses for a shoulder-length chestnut brown bob hairstyle.

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She wore clean and natural makeup, allowing her new hair to capture all the attention.

PHOTOS: Celebrity siblings 

Fanning is typically styled in youthful dresses featuring bright colors and bold designs, but this time around she opted for a subtle look. The younger sister to Dakota Fanning wore a black peplum top featuring a row of bow ties going down the center of the bodice, and black flared leg trousers by Oscar de la Renta.