List of Famous people born on September 21st

Yakov Grigorevich Sinai is a Russian mathematician known for his work on dynamical systems. He contributed to the modern metric theory of dynamical systems and connected the world of deterministic (dynamical) systems with the world of probabilistic (stochastic) systems. He has also worked on mathematical physics and probability theory. His efforts have provided the groundwork for advances in the physical sciences.

Anthony Page is a British stage and film director.

Howard James "Jay" Triano is a Canadian basketball coach and former professional player, who is currently the lead assistant coach of the Charlotte Hornets of the National Basketball Association (NBA). He previously served as the head coach of the NBA's Toronto Raptors and the interim head coach of the Phoenix Suns. A former Canadian national team player who competed in two Olympics, he has also had two stints as head coach of the national team.

Mario Czaja is a German politician of the Christian Democratic Union (CDU) who has been serving as the party's Secretary General since 31 January 2022, under the leadership of Friedrich Merz. He is a member of the German Bundestag since the 2021 elections. From 2006 until 2021, he was a member of the State Parliament of Berlin.

Robert James Woolsey Jr. headed the Central Intelligence Agency from February 5, 1993, until January 10, 1995. He held a variety of government positions in the 1970s and 1980s, including as United States Under Secretary of the Navy from 1977 to 1979, and was involved in treaty negotiations with the Soviet Union for five years in the 1980s. His career also included time as a professional lawyer, venture capitalist and investor in the private sector.

Wick C. Haxton is an American theoretical nuclear physicist and astrophysicist.

Benjamin Santos Abalos Sr. is a Filipino politician who served as a former chairman of the Commission on Elections. He was also a former chairman of the MMDA and mayor of Mandaluyong, Metro Manila. He is the father of Metro Manila Development Authority chairman and former Mandaluyong mayor Benjamin "Benhur" Abalos Jr..

Robert Patrick Benedict is an American stage, film and television actor and writer. His 25 year career includes more than 70 television and movie credits. He is best known for his work on the television series Supernatural, Threshold, Felicity and the comedy film Waiting.... He is also the lead singer/songwriter of the Los Angeles based band Louden Swain.