Special D. (born Dennis Horstmann, 16 September 1980) is a German DJ and dance music artist who is particularly popular in the Netherlands, where he won the 'Best Dance International' award at the 2004 TMF NL awards. He is also popular among the Eurodance scene in North America. The "D" in Special D comes from the DJ's first name, Dennis.

His best-known track, "Come With Me", reached number 6 in the UK Singles Chart and number 4 in the Irish Singles Chart in April 2004. He still proceeds to make new tracks, such as "You" or "Here I Am", which are frequently played on European dance floors.