Nasir bin Olu Dara Jones (/nɑːˈsɪər/; born September 14, 1973), known professionally as Nas (/nɑːz/), is an American rapper. Rooted in East Coast hip hop, he is regarded as one of the greatest rappers of all time.[2][3][4] The son of jazz musician Olu Dara, Nas began his musical career in 1989 under the moniker "Nasty Nas", and recorded demos under the wing of fellow East Coast rapper Large Professor. Nas first guest appeared on his group, Main Source's 1991 song "Live at the Barbeque".