Addison Morton Walker (born September 3, 1923), popularly known as 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 age 14, he regularly sold gag cartoons to Child Life, Flying Aces and Inside Detective magazines. When he was 15, he drew a comic strip, The Lime Juicers, for the weekly Kansas City Journal, and at age 18, he was the chief editorial designer for Hallmark Cards. 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 Italy, where he was an intelligence and investigating officer and was also in charge of a German POW camp. After the war he was posted to Italy where he was in charge of an Italian guard company. He was discharged as a first lieutenant in 1947. He graduated in 1948 from the University of Missouri, where he was the editor and art director of the college's humor magazine, Showme, and was president of the local Kappa Sigma chapter.