Underground Kingz is the fifth studio album by American hip hop duo UGK. The album was released on August 7, 2007, by Jive Records. The album includes collaborations with Z-RO, T.I., Talib Kweli, Rick Ross, Jazze Pha, Kool G Rap, Big Daddy Kane, Slim Thug, Dizzee Rascal, Too Short, Charlie Wilson, Middle Fingaz, OutKast, Three 6 Mafia, and many more. Production mainly came from Pimp C, N.O. Joe, Lil Jon, Jazze Pha, Swizz Beatz, DJ Paul & Juicy J, Scarface and Marley Marl.