George Murphy in the United Artists comedy musical film Top Of The Town, 1937.
Opens up with tap dancing to the tune of Jamboree composed by Jimmy McHugh and Harold Adamson.
Murphy is later joined by Peggy Ryan, in her first movie appearance at the age of 12/13.
Notice the reflective mirror stage, seems it was the order of the day (Check Broadway Melody 1940). Enjoy the tap dancing, solo & duet.