Garth Ivan Richard Porter AM (born 24 September 1948) is a New Zealand-born Australian multi-instrumental musician, songwriter and record producer. He was a member, on keyboards and backing vocals, of the pop group, Sherbet (1970–84), and co-wrote both of their number-one singles, "Summer Love" (March 1975) and "Howzat" (May 1976). Porter is a co-writer and producer for country music singer Lee Kernaghan.