Dennis Miller is a comedian, actor, and political commentator who is best known for his work on Saturday Night Live and his HBO talk show, DENNIS Miller Live. He is also known for his stand-up comedy tours and his appearances on various television shows. Miller is also an author and has written several books, including The Rants, which was released in 2005. He is also a frequent guest on the radio show The O'Reilly Factor. Miller's style of comedy is often referred to as 'comic ranting, ' which involves delivering humorous monologues with a sarcastic edge.