Of Mice & Men is a metalcore band formed in Costa Mesa, California, United States in 2009 by Austin Carlile and Jaxin Hall after Carlile's departure from Attack Attack!. The name of the band is derived from John Steinbeck's novel of the same title. The current line-up consists of Carlile (ex. Attack Attack!), Phil Manansala, Valentino Arteaga (ex. Lower Definition), Aaron Pauley (ex. Jamie's Elsewhere) and Alan Ashby.