From the AC/DC official site:
But the roots of AC/DC lie back in Australia, and before that Glasgow, Scotland, where Angus and Malcolm Young, the musical core of the band (and still the most formidable guitar team in rock history), were born (in 1958 and 1953, respectively). In 1963, the Young family migrated to Sydney, Australia, where music would make its mark on the brothers. (As a member of the Easybeats, Angus and Malcolm's older sibling, George Young, was responsible for one of Australia's first international hits, "Friday On My Mind," in 1966. From 1974 through 2000, George and musical collaborator, Harry Vanda, produced a number of AC/DC albums including "High Voltage,," "T.N.T.," "Dirty Deeds Done Dirt Cheap," "Let There Be Rock," "If You Want Blood You've Got It," "Powerage," "'74 Jailbreak," "Who Made Who," "Blow Up Your Video," and "Stiff Upper Lip.")