List of Famous people who are 89

Pierre Émile Cartier is a French mathematician. An associate of the Bourbaki group and at one time a colleague of Alexander Grothendieck, his interests have ranged over algebraic geometry, representation theory, mathematical physics, and category theory.

Sir Quentin Saxby Blake, CBE, FCSD, FRSL, RDI, is an English cartoonist, illustrator and children's writer. He has illustrated over 300 books, including 18 written by Roald Dahl, which are among his most popular works. For his lasting contribution as a children's illustrator he won the biennial international Hans Christian Andersen Award in 2002, the highest recognition available to creators of children's books. From 1999 to 2001 he was the inaugural British Children's Laureate. He is a patron of the Association of Illustrators.

Thomas Eugene Robbins is an American novelist. His best-selling novels are "seriocomedies". His novel Even Cowgirls Get the Blues was made into a movie in 1993 by Gus Van Sant and stars Uma Thurman, Lorraine Bracco, and Keanu Reeves.

José Saraiva Martins, C.M.F., GCC is a Portuguese Cardinal of the Roman Catholic Church. He is the Prefect Emeritus of the Congregation for the Causes of Saints, having served as prefect from 1998 to 2008.

Elliot Aronson is an American psychologist who has carried out experiments on the theory of cognitive dissonance, and invented the Jigsaw Classroom, a cooperative teaching technique which facilitates learning while reducing interethnic hostility and prejudice. In his 1972 social psychology textbook, The Social Animal, he stated Aronson's First Law: "People who do crazy things are not necessarily crazy," thus asserting the importance of situational factors in bizarre behavior. He is the only person in the 120-year history of the American Psychological Association to have won all three of its major awards: for writing, for teaching, and for research. In 2007 he received the William James Award for Lifetime Achievement from the Association for Psychological Science, in which he was cited as the scientist who "fundamentally changed the way we look at everyday life.” A Review of General Psychology survey, published in 2002, ranked Aronson as the 78th most cited psychologist of the 20th century. He officially retired in 1994 but continues to teach and write.