William Waldorf Astor, 3rd Viscount Astor (13 August 1907 – 7 March 1966) was a British businessman and Conservative Party politician and a member of the prominent Astor family.

Known as Bill Astor, he was the son of the 2nd Viscount Astor and the Viscountess Astor. He was educated at Eton College and at New College, Oxford. In 1932, he was appointed to the office of Secretary to the Earl of Lytton, League of Nations Committee of Enquiry in what was then known as Manchuria.

First elected to the British House of Commons in 1935, he served as a Conservative for the constituency of Fulham East. Between 1936 and 1937 he held the office of Parliamentary Private Secretary to the First Lord of the Admiralty Samuel Hoare, who was then made Secretary of State for the Home Department in the new cabinet of Neville Chamberlain in 1937.

Active in thoroughbred horse racing, he inherited Cliveden Stud, a horse farm and breeding operation in the village of Taplow near Maidenhead.

He left politics for a time, but returned as the Conservative Member of Parliament for Wycombe in the 1951 general election, serving for two years. On his father's passing in 1952, he inherited his title, becoming the 3rd Viscount Astor and causing a by-election in Wycombe which was won by the Conservative candidate John Hall.

Astor then took over the family's Cliveden estate in Buckinghamshire, where he and his family continued to live until 1966, when he died at age 58 from a heart attack.

During the Profumo Affair Astor was accused of having an affair with Mandy Rice-Davies. In response to being told during one of the trials arising out of the scandal that Astor had denied having an affair with her, Rice-Davies famously replied, "Well he would, wouldn't he?"

William Waldorf Astor married three times:

• 1) 1945: Sarah Kathleen Elinor Norton - (divorced 1953). They had one son, William Waldorf Astor, 4th Viscount Astor (born 1951)

• 2) 1955: Phillipa Victoria Hunloke, daughter of Henry Philip Hunloke - (divorced 1960). They had a daughter, Emily Mary Astor (born 1956)

• 3) 1960: Janet Bronwen Alun Pugh. They had two children, Janet Elizabeth Astor (born 1961) and Pauline Marian Astor (born 1964)

Category:1907 birthsCategory:British people of German descentCategory:1966 deathsCategory:Members of the United Kingdom Parliament for English constituenciesCategory:Viscounts in the Peerage of the United KingdomCategory:Conservative MPs (UK)Category:Astor familyCategory:Old West DownsCategory:UK MPs 1935-1945Category:UK MPs 1951-1955Category:Articles lacking sources (Erik9bot)Category:Deaths from myocardial infarctionde:William Waldorf Astor, 3. Viscount Astor