Complex sentence: She had her first leading role in an American movie in James Gray's "The Immigrant", starring as the Polish immigrant Ewa Cybulska, for her performance, Cotillard received rave reviews at the 2013 Cannes Film Festival in May, 2013.
Split into simpler sentences: She had her first leading role in an American movie in James Gray's "The Immigrant", starring as the Polish immigrant Ewa Cybulska. For her performance in the film, Cotillard was widely acclaimed at the 2013 Cannes Film Festival in May, 2013.