Madvillain was an American hip hop duo formed in 2002 by MF DOOM and Madlib. They are best known for their 2004 album Madvillainy, celebrated for its complex lyrics, innovative production, and unique use of samples. The album is considered a landmark in alternative hip hop and has had a lasting impact on underground rap. Although fans anticipated a second album, no new material has appeared since 2010, especially following MF DOOM's passing in 2020.