AC/DC is an Australian hard rock band formed in 1973 by brothers Malcolm and Angus Young. They helped pioneer the heavy metal genre though they prefer to call their music rock and roll. Some of their most famous albums include High Voltage, T.N.T., Dirty Deeds Done Dirt Cheap, Let There Be Rock, Highway to Hell, and Back in Black, which has sold over 50 million copies worldwide making it one of the highest-selling albums of all time.