Geller died in a plane crash in the mid morning when he and his wife were traveling from Santa Monica to Santa Barbara on a vacation.
Geller's songs included What Can It Be? and I Found Him.
Geller's long-time musical collaborator was Gene de Paul.
Geller was a famed composer, writing the scores for the off-Broadway musicals All in Love and Living the Life.
Geller married Jeannette Marx and they remained together until his death in 1978. They died together.
Geller went to Yale University, earning a BA degree.