Sergio Aragonés Domenech (/ˌærəˈɡoʊnɪs/ ARR-ə-GOH-niss, Spanish: [ˈseɾxjo aɾaɣoˈnez ðoˈmenek]; born September 6, 1937) is a Spanish/Mexican cartoonist and writer best known for his contributions to Mad magazine and creating the comic book Groo the Wanderer. Among his peers and fans, Aragonés is widely regarded as "the world's fastest cartoonist". The Comics Journal has described Aragonés as "one of the most prolific and brilliant cartoonists of his generation". Mad editor Al Feldstein said, "He could have drawn the whole magazine if we'd let him."