He often shot with natural light and hand-held cameras and gave actors freedom to improvise the script and move around within a scene's location. The crew roamed up and down the Pacific Coast Trail to shoot Witherspoon in 2014′s Wild.
"They can move anywhere they want," the Canadian filmmaker said of his actors in a 2014 interview with The Associated Press. "It's giving the importance to storytelling, emotion, characters. I try not to interfere too much. I don't need to cut performances. Often, the cinematographer and I were like, 'This location sucks. It's not very nice. But, hey, that's life.'"
He re-teamed with Witherspoon to direct the first season of Big Little Lies in 2017, and directed Adams in 2018′s Sharp Objects, also for HBO. Vallée won DGA awards for both.