Figure and landscape painter in oil and watercolour, draughtswoman and etcher. Born in Derbyshire, she studied art under Wilson Foster at Nottingham School of Art where she met her husband Harold Knight. Together they spent 1908 - 1918 in Cornwall. Knight exhibited first at the RA in 1903 and had a first exhibition with Harold at the Leicester Galleries in 1906. Following which her work was exhibited widely in Britain and abroad. The Tate Gallery, British Museum and Imperial War Museum hold her work. She became a Dame in 1929 and was elected to the RA in 1936.
Knight was a powerful Colourist and a prolific and strident draughtswoman. Especially fond of capturing scenes from the circus, ballet, music-hall, racing and Romany life. During the second World War she worked for the War Artists' Advisory Committee, completed a number of excellent pictures, and drew the war crime trials at Nuremberg.
Retrospectives of her work were held at the Upper Grosvenor Galleries in 1969 and the Nottingham Castle Museum in 1970.