Legal name: William Paul Mitchell
Large Professor (born William Paul Mitchell on March 21, 1973 in Harlem, New York City, New York. United States), also known as Large Pro and Extra P., is a New York City-based hip hop rapper and record producer. He is also best known as a founding member of the influential underground hip hop group Main Source, and as mentor and frequent collaborator of Nas. About.com ranked Large Professor #5 on its Top 50 Hip-Hop Producers list.