Alexander Marcus (born 24 December 1979) is a persona of the German house music producer Felix Rennefeld. He has become popular throughout Germany after a series of videos he produced and displayed on youtube. Rennefeld was born in Berlin. After his parents were divorced Rennefeld lived with his grandmother in the country, where he took part in the popular children's dance group "Edelweißchen". At eighteen he went to the USA and lived in New York and Miami, and while there experienced international and electronic music.