But nothing has quite matched the impact of the film that first put her on the map until now.
At 19, Steinfeld has nabbed a complex part worthy of her talent.
On the surface, Steinfeld has little in common with her character.

Credit: Daniel Zuchnik/WireImage
Passages in the script made her cry.
She knew exactly how this rebellious nonconformist should dress.
Somehow I found the ability to trust myself and my instinct and run free.
I sat at the monitor with tears streaming down my face, Fremon Craig says.
It was one of my favorite days.
Youd think shed been doing this for 30 years.
I want to know how to produce a song.
I want to do all of it.
I just need to pace myself because I get overly ambitious sometimes.
I want to do all of it right now.
Steinfeld doesnt quite know whats next.
Im in a similar place to where we leave Nadine in this movie, she says.
Shes good, shes got it figured out, shes on the right path, and shes happy.
Ive never been in the position where Im like, Okay, Im an adult now.
I need to shake up [my younger] image.
A version of this story appears in Entertainment Weekly #1440, availablehere.