Greg Fitzsimmons is an American comedian, writer, and television host. He is well known for his sharp observational humor and has appeared on numerous late-night talk shows, including "The Tonight Show" and "Late Show with David Letterman." Fitzsimmons has released several stand-up specials and albums, such as "Life on Stage" (2013). As a writer, he has contributed to shows like "The Ellen DeGeneres Show," for which he won four Daytime Emmy Awards. Fitzsimmons also hosts the popular podcast "FitzDog Radio," where he interviews fellow comedians and entertainers. His multifaceted career in stand-up, writing, and broadcasting has solidified his reputation as a versatile and influential figure in comedy.