Mills Blue Rhythm Band was an American big band of the 1930s. The band was formed in Harlem in 1930. It started life as the Coconut Grove Orchestra, changing to Mills Blue Rhythm Band when Irving Mills became its manager in 1931. At various times the same group was known as the “Blue Rhythm Band”, “Blue Ribbon Band”, “Blue Rhythm Boys”, “The Blue Racketeers”, “Earl Jackson’s Musical Champions”, “Earl Jackson and his Orchestra”, “Duke Wilson and his Ten Blackberries”, “King Carter’s Royal Orchestra”, “Mills Music Masters”, “Harlem Hot Shots” and uncredited playing behind Louis Armstrong. The Mills Blue Rhythm Band were based at The Cotton Club in Manhattan. They worked steadily through the 1930s deputizing for the Duke Ellington and Cab Calloway Orchestras; often taking their undesirable engagements. Violinist Carroll Dickerson briefly fronted the band, followed by Drummer Willie Lynch in 1931 and then compere Jimmy Ferguson (Baron Lee). Edgar Hayes, Eddie Mallory and Dave Nelson all had temporary stints as band leader until Lucky Millinder permanently took over the role in 1934.