Hailee Steinfeld dazzles in dreamy dress at 2017 Oscars

She's all grown up!

Hailee Steinfeld, 20, proved she knows how to light up any red carpet during the 2017 awards show season -- and Sunday night's Academy Awards was no exception.

The "Pitch Perfect 2" star turned heads in a dreamy halter dress with floral and ruffle detailing throughout. Steinfeld's gorgeous floor-length ensemble cinched at the waist, showing off her teeny physique.

While the gown was show-stopper on its own, she completed the look with some jaw-dropping diamonds that adorned her ears and wrists.

Hailee, who was nominated for a Golden Globe this year for her hit film "Edge of Seventeen," went totally glam with her hair and makeup. She rocked a dramatic smokey eye and pale pink lips and she swept her brunette tresses up in a fancy bun.

While the rising star showed up in one of the best looks of the night, she wasn't the only one to make a dramatic Oscars entrance! Check out all the looks in the slideshow below: