The noted monologist is Jay LENO, a four-letter word. LENO is an American comedian, actor, writer, producer, and former late-night television host. He was the host of NBC's The Tonight Show with Jay LENO from 1992 to 2009 and again from 2010 to 2014. He has been a frequent guest on Late Night with David Letterman and has also appeared on other talk shows. LENO is known for his observational humor and his ability to deliver a monologue.