Iwan Rheon (born May 13, 1985) is a Welsh actor, singer, and musician. He is best known for his roles as Simon Bellamy in the E4 series Misfits, Ramsay Bolton in the HBO series Game of Thrones, and Mötley Crüe guitarist Mick Mars in the film The Dirt. He has also appeared in the series Vicious, Riviera, and Inhumans.