List of Famous people who are 89

Sigrun Krokvik is the pen name of crime fiction writer Sigrun Karin Christiansen. She made her literary debut in 1972 with the thriller Bortreist på ubestemt tid. She published the novel Kikkeren in 1973. She was awarded the Riverton Prize in 1972, and was the first recipient of this prize.

Andrzej Ehrenfeucht is a Polish American mathematician and computer scientist. He formulated the Ehrenfeucht–Fraïssé game, using the back-and-forth method given by Roland Fraïssé in his PhD thesis. The Ehrenfeucht–Mycielski sequence is also named after him.

Clifton Curtis "C.C." Williams Jr., was an American naval aviator, test pilot, mechanical engineer, major in the United States Marine Corps, and NASA astronaut, who was killed in a plane crash; he never went into space. The crash was caused by a mechanical failure in a NASA T-38 jet trainer, which he was piloting to visit his parents in Mobile, Alabama. The failure caused the flight controls to stop responding, and although he activated the ejection seat, it did not save him. He was the fourth astronaut from NASA's Astronaut Group 3 to have died, the first two having been killed in separate T-38 flights, and the third in the Apollo 1 fire earlier that year. The aircraft crashed in Florida near Tallahassee within an hour of departing Patrick AFB.