The Grimethorpe Colliery Band is a brass band, based in Grimethorpe, South Yorkshire, England. It was formed in 1917, as a leisure activity for the workers at the colliery, by members of the disbanded Cudworth Colliery Band. Along with the Black Dyke Mills Band, the band became the first to perform at the Proms. Grimethorpe Band achieved worldwide fame after appearing in the film Brassed Off.