Joan Weldon is an American film and television actress. She began her career singing in the San Francisco Grand Opera Company chorus. Later she became a contract actress with Warner Bros. where she remained until her contract ended in 1954. Her most prominent film was the cult thriller Them!
Weldon had a brief television career in the 1950s. Her first appearance in 1955 was in an episode of The Millionaire, starring Marvin Miller. She made three appearances on Lux Video Theater in various roles. She also played Marian Keats in the title role of the Perry Mason episode, "The Case of the Angry Mourner" in 1957. Her final television appearance was in 1958 on Shirley Temple Theater.
She resumed her career as a singer in road company productions including The Music Man and Oklahoma!. Weldon retired in 1980.