List of Famous people who are 73

Cheryl Elisabeth Praeger is an Australian mathematician. Praeger received BSc (1969) and MSc degrees from the University of Queensland (1974), and a doctorate from the University of Oxford in 1973 under direction of Peter M. Neumann. She has published widely and has advised 27 PhD students. She is currently Emeritus Professor of Mathematics at the University of Western Australia. She is best known for her works in group theory, algebraic graph theory and combinatorial designs.

Judyann Elder is an American actress, director, and writer.

Domingos Elias Alves Pedra, commonly known as Dé Aranha, is a retired Brazilian footballer who played as a Forward for several Série A clubs.

Luis Angel Caffarelli is an Argentine mathematician and luminary in the field of partial differential equations and their applications.