Joseph Gribble is a character on the sitcom King of the Hill. He is Dale Gribble's stepson (John Redcorn is his real dad, although he and Dale don't know this). He is also Bobby Hill's best friend. He is voiced by Brittany Murphy in seasons 1-4 and Breckin Meyer in seasons 5-13. Jeff Boom.jpg|Season 1-4. Joesph.jpg|Season 5-13.