Frederick Colin Petersen (born 24 March 1946) is an Australian drummer, record producer and former child actor. He played as a member of the bands Steve and the Board, the Bee Gees and Humpy Bong. In August 1969, he left the Bee Gees and he was replaced by Pentangle drummer Terry Cox to record the songs for their 1970 album Cucumber Castle. His scenes from the film of the same name were cut, and he is not credited on the accompanying album soundtrack, even though he does play on some songs.