kwebtv:

Jack Edward Larson (February 8, 1928 – September 20, 2015) Actor, librettist, screenwriter and producer. He is best known for his portrayal of photographer/cub reporter Jimmy Olsen on the TV series Adventures of Superman.

His other TV credits include

L.I.M. Mr. Larson

broadcastarchive-umd:

Adventures of Superman (Syndicated, 1952-58). The show’s first two seasons (episodes 1–52, 26 titles per season) were filmed in black-and-white; seasons three through six (episodes 53–104,
13 titles per season) were filmed in color but originally telecast monochromatically in first-run syndication. Television viewers would not see Superman in color until the series was syndicated to local stations in 1965. (Wikipedia)

Loved this when I was a kid, watching it in reruns. Been rewatching the series on MeTV and am a little stunned by how kid-oriented the show actually was! Still a hoot to watch, though.