The album boasts guest appearances from Snoop Dogg, James Fauntleroy and Ronald Isley among others has been made available on iTunes, reported Aceshowbiz.
Serving as the follow-up to Lamar's 2012 critically-acclaimed debut set "good kid, m A A d City", the new album features 16 tracks including the previously-revealed "i", "The Blacker the Berry" and "King Kunta".
The reason behind the album's early arrival is unclear.