Madras Rajagopala Radhakrishnan Naidu (14 April 1907 – 17 September 1979), popularly known by his stage name, M. R. Radha, was an Indian movie actor and politician. He was given the title of "Nadigavel" (Spearhead of acting / frontrunner /torchbearer) by E.V.R. Periyar in a stage, for his acting prowess. After a successful career on stage in his early years, he acted in movies from the 1930s to the 1970s, and then, giving up movies, he went back to his first love, the stage.