Nick Rotteveel, professionally known as Nicky Romero or Monocule, is a Dutch DJ, record producer and remixer from Amerongen, Utrecht Province. He has worked with, and received support from DJs, such as Tiësto, Fedde le Grand, Sander van Doorn, David Guetta, Calvin Harris, Armand van Helden, Avicii and Hardwell.