Reginald John Whistler was born in Britain on 24 June 1905, in Eltham, Kent (now part of the Royal Borough of Greenwich), the son of architect and estate agent Henry Whistler and Helen Frances Mary, the daughter of Rev. Charles Slegg Ward, vicar of Wootton St Lawrence, and through her mother a descendant of the goldsmith and silversmith Paul Storr. His most noted work during the early part of his career was for the café at the Tate Gallery, completed in 1927 when he was only 22. He was commissioned to produce posters and illustrations for Shell Petroleum and the Radio Times. He also created designs for Wedgwood china based on drawings he made of the Devon village of Clovelly, and costumes "after Hogarth" for the premiere production of William Walton's ballet The Wise Virgins, produced by the Sadler's Wells Company in 1940. Whistler's elegance and wit ensured his success as a portrait artist among the fashionable; he painted many members of London society, including Edith Sitwell, Cecil Beaton and other members of the set to which he belonged that became known as the "Bright Young Things". His murals for Edwina Mountbatten's 30-room luxury flat in Brook House, Park Lane, London were later installed by the Mountbattens’ son-in-law, decorator David Hicks, in his own houses.