Ann Thetis Blacker (13 December 1927 – 18 December 2006) was an English painter and singer. She was noted for her richly coloured pictures, especially using the batik wax-resist fabric dyeing process. Blacker was born in Holmbury St Mary, Surrey, England. She was the daughter of Carlos Paton Blacker, a psychiatrist, and granddaughter of Carlos Blacker, a friend of Oscar Wilde. Blacker intended to be a singer and studied with the German mezzo-soprano singer Elena Gerhardt in London. She appeared in the chorus at Glyndebourne opera in the 1950s and sang the role of "Mother Goose" in The Rake's Progress by Igor Stravinsky. When her singing career was cut short by vocal issues in the mid-1950s, Blacker turned her focus to painting. She studied at the Chelsea School of Art in London and was tau