Fred Wallace Haise Jr. ( HAYZ; born November 14, 1933) is an American former NASA astronaut, engineer, fighter pilot with the U.S. Marine Corps and U.S. Air Force, and a test pilot. He is one of 24 people to have flown to the Moon, having flown as Lunar Module Pilot on Apollo 13. He was slated to become the 6th person to walk on the Moon, but the Apollo 13 landing mission was aborted en route.

Haise went on to fly five Space Shuttle Approach and Landing Tests in 1977, and retired from NASA in 1979.