The Grim Adventures of Billy & Mandy is an American animated television series that aired on Cartoon Network. Having originally aired as part of Grim & Evil in 2001, the show began airing under the Grim Adventures of Billy and Mandy title on June 13, 2003, ending on October 12, 2008 with the finale, Underfist.
Featuring the voices of Greg Eagles, Grey DeLisle, and Richard Steven Horvitz, the series stars the two main characters, Billy and Mandy, having manipulated the Grim Reaper, usually called "Grim", into being their best friend for eternity after having won a bet over a sick hamster through a game of limbo.