Stewart plays the complex assistant to veteran actress (
"There is a great divide between what motivates people to make movies in the States and what motivates people to make movies here, and I prefer it here," Stewart said after claiming her award, according to the Hollywood Reporter. She also hinted at making another French drama but did not provide details.
In taking the prize Stewart beat out a number of homegrown favorites, including the French actresses Marianne Denicourt and Claude Gensac.
Adrien Brody was the last American to win a competitive Cesar, for 2002's "The Pianist."
Stewart is of course known for starring in the massively popular teen vampire franchise
Her upcoming films include
A complete list of this year's winners is available on the Cesar website.