Toto20 found a nice article/interview with Natalie in the October issue of Mindfood. It’s mostly a mix of old quotes but certainly well worth a read. You can read it in full here and below is a little excerpt.

“I’m trying to be bolder in some of my creative choices and be less self-censoring,” Portman explains. “I want to be ambitious and do interesting work but at the same time not limit myself to projects that are arty 
or auteurish. I thrive on heavy, dramatic roles, 
but sometimes you need to escape a bit and try other things.”