Mort Walker, is an American comic artist best known for creating the newspaper comic strips Beetle Bailey in 1950 and Hi and Lois in 1954. He has signed Addison to some of his strips.

Born in El Dorado, Kansas, he grew up in Kansas City, Missouri. He had his first comic published at age 11, and sold his first cartoon at 12. At 15, he worked as a comic-strip artist for a daily newspaper, and by 18 became chief editorial designer at Hall Brothers. Graduating from Northeast High School, he attended the University of Missouri, where today a life-sized bronze statue of Beetle Bailey stands in front of the alumni center.

In 1943, Walker was drafted into the United States Army and served in Europe during World War II. He was discharged as a first lieutenant in 1947. He graduated from the University of Missouri in 1948, having been president of the local Kappa Sigma chapter. He then went to New York to pursue a career in cartooning. His first 200 cartoons were rejected, but he slowly gained recognition for his talent. His break came with Beetle Bailey, followed by Hi and Lois. Other comic strips he created include Boner's Ark, Gamin & Patches, Mrs. Fitz's Flats, The Evermores, Sam's Strip and Sam and Silo (the last two with Jerry Dumas).

After more than 50 years in the business, Walker still supervises the daily work at his studio, which employs six of his children. He is one of the longest-drawing cartoonists in history.