From Wikipedia, the free encyclopedia. Denis Colin Leary (born August 18, 1957) is an American actor, comedian, writer, director and film producer. Leary is known for his biting, fast paced comedic style and chain smoking. He is the star and co-creator of the television show Rescue Me, which ended its seventh and final season on September 7, 2011. Leary has starred in many motion pictures, most recently as CaptainGeorge Stacy in Marc Webbs 2012 film The Amazing Spider-Man and the voice of Diego in the animated Ice Age series.