Otis Jackson Jr. (born October 24, 1973), known professionally as Madlib, is an American DJ, multi-instrumentalist, rapper, and music producer. He is one of the most prolific and critically acclaimed hip hop producers of the 2000s and has collaborated with different hip hop artists under a variety of pseudonyms, including MF DOOM (as Madvillain), as well as the late J Dilla (as Jaylib). Madlib has described himself as a "DJ first, producer second, and MC last," and he has done several projects as a DJ, mixer, or remixer.