August 21 is the 233rd day of the year (234th in leap years) in the Gregorian Calendar. There are 132 days remaining.
- 1165 - Philip II of France
- 1765 - William IV of the United Kingdom (+ 1837)
- 1811 - William Kelly, iron manufacturer, inventor (+ 1888)
- 1872 - Aubrey Beardsley, illustrator (+ 1898)
- 1904 - Count Basie (William Allen Basie), bandleader (+ 1984)
- 1906 - Fritz Freleng, movie animator
- 1920 - Christopher Robin Milne, propotype of the Christopher Robin in the Winnie the Pooh stories
- 1923 - Shimon Peres, Prime Minister of Israel
- 1924 - Jack Weston, actor (+ 1996)
- 1924 - Chris Scheknel, sports journalist
- 1928 - Art Farmer, trumpet player
- 1930 - Princess Margaret of the United Kingdom (+ 2002)
- 1932 - Melvin Van Peebles, actor, screenwriter
- 1936 - Wilt Chamberlain, Basketball Hall of Famer (+ 1999)
- 1938 - Kenny Rogers, singer, actor
- 1939 - Clarence Williams III, actor
- 1944 - Jackie DeShannon, singer
- 1956 - Kim Cattrall, actress
- 1959 - Jim McMahon, National Football League quarterback
- 1963 - Mohammed VI of Morocco
- 1967 - Carrie-Anne Moss, actress
- 1969 - Joseé Chouinard, Canadian figure skater
See Also:
August 20 - August 22 - July 21 - September 21 -- listing of all days
January, February, March, April, May, June, July, August, September, October, November, December