Colin Walker (born 8 July 1949) is an English cellist who played with Electric Light Orchestra (ELO) from 1972 to 1973. He was born in Minchinhampton, Gloucestershire, and was educated at Marling School in Stroud and the Royal Academy of Music in London. By his own admission, his greatest regret was not playing on The Beatles' "Eleanor Rigby". During his time in ELO, Walker played cello on two of their albums – ELO 2 and side two of On the Third Day – and he used a German-made cello with steel strings. He also contributed cello to the single Showdown. Walker has also worked as a teacher.