Curtis Armstrong (born June 6, 1954) is an American actor best known for playing the roles of Booger in the "Revenge of the Nerds" movies, Herbert Viola on the TV series "Moonlighting", Miles Dalby in the film "Risky Business", famed record producer Ahmet Ertegün in the film "Ray" as well as for playing the role of Metatron on the TV series "Supernatural."