Known for his raw, "guy's guy" humor and playing a brash firefighter on FX's Rescue Me, Denis is a sensitive guy at heart. Denis established the Leary Firefighters Foundation in 2000 after losing a friend and family member in a warehouse fire. The foundation works to provide fire departments with the funding and resources they need to have the most current equipment and training.
He's also a fan of Oprah! Find out why he didn't want to like her show—and how he came around.