[2] Weldon began her career singing in the San Francisco Grand Opera Company chorus.

[7] After working in film and television, she resumed her career as a singer in road company productions including The Music Man[8] and Oklahoma!

In 1953, Weldon appeared as the soprano soloist on a broadcast of The Standard Hour on NBC radio.

[4] Although her background was singing in operas, The System and her next two films, So This Is Love and Rear Guard, all had her in non-singing roles.

In 1958, she portrayed Grace Wheeler in an episode of Maverick titled "Plunder of Paradise" starring Jack Kelly, Leo Gordon and Ruta Lee.