John de Lancie (born March 20, 1948) is an American stand-up comedian, actor, director, producer, writer, singer, musician, voice artist, and comedian, best known for his role as Q in Star Trek: The Next Generation, Star Trek: Deep Space Nine, and Star Trek: Voyager and Discord in My Little Pony: Friendship Is Magic. He has been featured in several recurring roles on television series, including Frank Simmons in Stargate SG-1 and Donald Margolis in Breaking Bad.