Who directed the movie with which Suzanne Clément was best know for? 
Suzanne Clément:  She is perhaps best known for her work in Xavier Dolan's arthouse films "I Killed My Mother" (2009), "Laurence Anyways" (2012) and "Mommy" (2014). I Killed My Mother: I Killed My Mother (French: J'ai tué ma mère ) is a 2009 Quebec biographical drama film written and directed by Xavier Dolan.
Xavier Dolan