James Matthew Dewees (born March 13, 1976) is an American musician best known for his work with The Get Up Kids, Reggie and the Full Effect and My Chemical Romance. He has also been involved in many musical projects including New Found Glory, Coalesce, Leathermouth, and Death Spells. Dewees graduated from Liberty High School in Liberty, Missouri in 1994. He started college at William Jewell College in Liberty later transferring to the University of Missouri to study music composition. In 1995, he was asked to replace Sean Ingram as vocalist for the Kansas City hardcore band Coalesce.