Guitarist brothers Angus and Malcolm Young have anchored hard-rockers AC/DC since the band's formation in 1973.
Angus Young was born March 31, 1955, in Glasgow, Scotland. He and his brother formed AC/DC in Australia in 1973.
Their sister suggested that Angus wear his school uniform onstage. This strange sartorial choice became Young's trademark, and he continues to perform in such clothes.
Highway to Hell (1979) made AC/DC international superstars. Following its release, singer Bon Scott choked to death and was replaced by Brian Johnson.
Scott's first LP with the band, Back in Black, was the group's most successful and spawned the perennial party classic "You Shook Me All Night Long" (RealAudio excerpt).
Earlier this month, AC/DC returned with their first LP of new material in five years, Stiff Upper Lip, and its popular title cut (RealAudio excerpt).
Other birthdays on Friday: Thijs Van Leer (Focus), 52; Sean Hopper (Huey Lewis and the News), 47; and Robert Holmes ('Til Tuesday), 41.