David Hockney, CH, RA, (born 9 July 1937) is an English painter, draughtsman, printmaker, stage designer and photographer, who is based in Bridlington, Yorkshire, although he also maintains a base in London. An important contributor to the Pop art movement of the 1960s, he is considered one of the most influential British artists of the twentieth century. Hockney was born in Bradford and educated first at Wellington Primary School. He later went to Bradford Grammar School, Bradford College of Art and the Royal College of Art in London, where he met R. B. Kitaj. While still a student at the Royal College of Art, Hockney was featured in the exhibition Young Contemporaries—alongside Peter Blake that announced the arrival of British Pop Art. He became associated with the movement, but his early works also display expressionist elements, not dissimilar to certain works by Francis Bacon. Sometimes, as in We Two Boys Together Clinging (1961), named after a poem by Walt Whitman, these works make reference to his love for men. In 1963 Hockney visited New York, making contact with Andy Warhol. A later visit to California, where he lived for many years, inspired Hockney to make a series of paintings of swimming pools in Los Angeles, using the comparatively new Acrylic medium and rendered in a highly realistic style using vibrant colours. In 1967, his painting, Peter Getting Out Of Nick's Pool, won the John Moores Painting Prize at the Walker Art Gallery in Liverpool. He also made prints, portraits of friends, and stage designs for the Royal Court Theatre, Glyndebourne, La Scala and the Metropolitan Opera in New York City.