William Belleau

Biography

William Belleau is a Secwépemc Canadian actor born on April 15, 1982, in Williams Lake, British Columbia. He rose to prominence with roles in the films Killers in the Flower Moon (2023) and Eddington (2025), as well as the drama television series Frontier. A descendant of Residential School Survivors, Belleau drew from his heritage while pursuing his acting career, which took him to New York City for dramatic arts training.