Mull's unscheduled career in acting started with art school. As a means of earning tuition he organized bands; the only problem was that he couldn't sing, so he started doing comedy routines. His success as a humorist soon led to a recording contract. Nominated several times for a Grammy, his recordings include "Martin Mull and His Fabulous Furniture in Your Living Room," "Normal," "Days of Wine and Neuroses," and "I'm Everyone I Ever Loved."
His first break in television was on "Mary Hartman, Mary Hartman," which he describes as the "Roseanne of the 1970s." Since then he has also done over two dozen feature films, including "Mrs. Doubtfire," "FM," "Serial," "My Bodyguard" and "Mr. Mom," to name a few. He is also well-known for his role in the series, "Fernwood 2 Nite"; as well as ABC's "Roseanne," in which he played Roseanne's gay boss, Leon. Mull won a Writer's Guild Award and an ACE Award for the cable show, "History of White People in America."
Mull was a teaching fellow and has a Masters degree in art from Rhode Island School of Design, and has since stayed in touch with the medium both through painting or drawing. His book, "Painting, Drawing and Words," published by Journey Editions, is 10 years' worth of work that he has compiled.
Mull was born in Chicago, Illinois, the oldest of three children, and was raised in North Ridgeville, Ohio. The creative bent runs in his family, as he has a brother in antiques and a sister who is a writer. Mull lives with his wife, Wendy, a composer and musician, and they had a daughter, Maggie.