Brian Alexander "B. A." Robertson (born 12 September 1948 in Glasgow) is a Scottish musician, actor, composer and songwriter. He had a string of hits in the late 1970s and early 1980s, characterised by catchy pop tunes and jaunty, humorous lyrics, most notably "Bang Bang", a tongue-in-cheek commentary on famous historical and fictional couples. He has also written songs for Mike Rutherford including "The Living Years" which was a number 1 hit in several countries. He has also written music for films and been a television presenter.