John Maler Collier was a British painter and writer. He painted in the Pre-Raphaelite style, and was one of the most prominent portrait painters of his generation. Both of his marriages were to daughters of Thomas Henry Huxley. He was educated at Eton College, and he studied painting in Paris with Jean-Paul Laurens and at the Munich Academy starting in 1875.

The Royal Society of Portrait Painters is a charity based at Carlton House Terrace, SW1, London that promotes the practice and appreciation of portraiture art.