Jack Grimes (actor)
Jack Grimes was an American voice and radio actor who played Jimmy Olsen in the last three years of The Adventures of Superman radio program, the 1966 Filmation TV series The New Adventures of Superman, and also for his performance on the 1967 anime Speed Racer.
Grimes was born April 1, 1926, in New York City. His acting career began at age 7, during the depression, when he helped earn money for his family. He completed grammar school at the Professional Childrens School and went on to complete four years at Columbia University.
Source: Wikipedia