Hollywood's hottest stars are lighting up the City of Lights! Sean Penn, Charlize Theron, Kristen Stewart and Juilette Binoche all put on their best duds to attend the 40th Cesar Film Awards 2014 at Theatre du Chatelet in Paris, France on Friday night. The esteemed awards show is the French equivalent to the Academy Awards.

It was a big night for the Twilight actress -- when she took home the Best Supporting Actress Award. Stewart, who was the first American actress nominated in 30 years, became the first American actress to win a Cesar, which she won for her role in Clouds of Sils Maria. Go 'Merica!

The critically acclaimed film was directed by Olivier Assayas and also starred Juliet Binoche and Chloe Grace Moretz.

Penn, who was accompanied by his lady love, was at the event to receive an honorary Cesar Award.