Metallica is an American heavy metal band formed in Los Angeles in 1981 by James Hetfield and Lars Ulrich, later joined by Kirk Hammett and Robert Trujillo. One of the most successful and influential metal bands of all time, Metallica is known for their aggressive riffs, complex arrangements, and powerful lyrics. Their early albums, such as Kill ‘Em All (1983) and Master of Puppets (1986), are considered classics of thrash metal. The band achieved mainstream success with Metallica (1991), also known as The Black Album, which featured hits like “Enter Sandman” and “Nothing Else Matters.” Over their career, Metallica has sold over 125 million records worldwide, won numerous awards, including nine Grammys, and has been inducted into the Rock and Roll Hall of Fame. Their enduring popularity and influence have solidified them as legends of heavy metal.