Alison Dickey and John C. Reilly at the "Killers Of The Flower Moon" Cannes Film Festival Premiere on May 20, 2023 in Cannes, France ; Leo Reilly and brother Arlo Reilly pose for a photo together ...
John C. Reilly is best known for playing a goof in movies like Stan and Ollie and Step Brothers — and he picked up some of the inspiration for those roles from his two sons, Leo and Arlo.