Avenged Sevenfold (sometimes abbreviated as A7X) are an American rock band from Huntington Beach, California, formed in 1999. The band's members are lead vocalist M. Shadows, rhythm guitarist and backing vocalist Zacky Vengeance, lead guitarist and backing vocalist Synyster Gates, bass guitarist Johnny Christ, and drummer and percussionist Arin Ilejay.
They are known for their diverse rock sound and dramatic imagery in album covers and t-shirts. Avenged Sevenfold emerged with a metalcore sound on their debut Sounding the Seventh Trumpet but their style had evolved by their third album and first major label release, City of Evil into a hard rock/heavy metal sound. The band continued to explore new sounds with their self-titled release and enjoyed continued mainstream success before their drummer, James "The Rev" Sullivan, died in 2009. Despite his death, the band continued on with help of now-former Dream Theater drummer Mike Portnoy and released and toured in support of their fifth album Nightmare in 2010 which debuted on the top spot of the Billboard 200, their first number one debut.
To date, Avenged Sevenfold has released five studio albums, one live album/compilation/DVD, and eighteen singles and sold more than 8 million albums worldwide.