As the face of Miu Miu's fall campaign, Hailee Steinfeld attended a party the label held in Los Angeles last night and posed with fellow teen fashion plate Tavi Gevinson. Unsurprisingly, Hailee, 14, wore Miu Miu — a pink sheath dress with a beaded collar and peep-toe heels to match (her clutch is by big sister brand Prada); while Tavi, 15, wore a long floral-print gown, a chunky metallic necklace, and some heavy black winged eyeliner.

Look at them looking so grown-up! Which look do you prefer? Hailee's simple sheath or Tavi's boho granny chic?