Madvillainy is the only studio album by American hip hop duo Madvillain, consisting of British-American rapper MF Doom and American record producer Madlib. It was released on March 23, 2004, on Stones Throw Records.

Madvillain was an American hip hop supergroup formed in 2002, consisting of rapper MF DOOM and producer Madlib. Their only album, Madvillainy (2004), earned critical acclaim and cult popularity, widely regarded as one of the greatest rap albums of all time and a benchmark record for alternative hip hop. Their intricate rhymes and lyrics, short song structures and use of obscure, stylistically diverse samples made for a sound that was generally unfriendly to commercial radio but was lauded for its influence on underground rap. A follow-up album to Madvillainy was rumored to be in production at various times since the late 2000s, but no further original material has surfaced from the duo since 2010, and MF DOOM's death in 2020 has left the future of the project uncertain.