The Crown is a historical drama streaming television series about the reign of Queen Elizabeth II, created and principally written by Peter Morgan, and produced by Left Bank Pictures and Sony Pictures Television for Netflix. Morgan developed it from his drama film The Queen (2006) and especially his stage play The Audience (2013). The first season covers the period from Elizabeth's marriage to Philip, Duke of Edinburgh in 1947, to the disintegration of her sister Princess Margaret's engagement to Group Captain Peter Townsend in 1955. The second season covers the period from the Suez Crisis in 1956 to the retirement of Prime Minister Harold Macmillan in 1963 and the birth of Prince Edward in 1964. The third season spans the period between 1964 and 1977, including Harold Wilson's two periods as prime minister, and introduces Camilla Shand. The fourth season spans 1977 to 1990 and includes Margaret Thatcher's tenure as prime minister and Lady Diana Spencer's marriage to Prince Charles. The fifth and sixth seasons, which will close the series, will cover the Queen's reign into the 21st century.