Anvil is a Canadian heavy metal band who has influenced many musical groups including Slayer and Metallica. The band's history is chronicled in the 2009 documentary Anvil! The Story of Anvil. The roots of Anvil began in April 1973 in Toronto, when high school friends Steve "Lips" Kudlow and Robb Reiner began playing music together. They met through friend, guitarist and neighbour Marty Hoffman, but "musical differences" caused his departure after their first show.