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Clemens grew up as the son of information technology specialist Eberhard Clemens and his wife Sylvia Clemens.
After finishing grammar school in 2002, he lived for one year in London to improve his English and study fashion. After he had tried to launch a fashion line by himself and after some experience in the business he was hired by the German fashion label Lac et Mel. The first fashion show took place at a variety theatre in Leipzig on 21 October.
Clemens' collections have been shown at the Mercedes-Benz Fashion Week in Berlin. In March 2010 Clemens started his own brand under his name with a new collection. He is based in London.