Denis Leary is an American comedian, actor, and director most known for his crude comedic style as well as his rolls in film. Having both parents hailing from Ireland, Denis Leary is both an American and Irish citizen. He is also the 3rd cousin of comedian, talk show host, and ordained minister, Conan O’Brien. Denis is also a strong advocate for fire fighters, as he owns the Leary Firefighters Foundation as well as being the star and co-creator of the hit Fox Show Rescue Me, a nail biting gritty drama about fire fighters. He has been nominated 14 times for Rescue Me. He also voiced the beloved character from Ice Age, Diego, a saber tooth tiger who helps return a young human child to his family.