Maria Rainer: A postulant at Nonnberg Abbey, the high-spirited Maria is sent to be a governess for the von Trapp family.
The Mother Abbess: The inspirational and religious leader of the nuns at the Abbey.
Sister Berthe: A strict nun who is not a fan of nonsense.
Sister Margaretta: An empathetic nun who sees something good in Maria.
Sister Sophia: Another sister who isn’t sure what to do with Maria.
Captain Georg von Trapp: A widowed naval captain with seven children.
Liesl: Captain von Trapp’s daughter, age sixteen.
Friedrich: Captain von Trapp’s son, age fourteen.
Louisa: Captain von Trapp’s daughter, age thirteen.
Kurt: Captain von Trapp’s son, age ten.
Brigitta: Captain von Trapp’s daughter, age nine.
Marta: Captain von Trapp’s daughter, age seven.
Gretl: Captain von Trapp’s youngest daughter.
Rolf Gruber: Age seventeen, Liesl’s suitor.
Elsa Schraeder: A wealthy baroness trying to catch the Captain’s attention.
Franz: The butler
Frau Schmidt: The housekeeper
Ursula: The maid
Max Detweiler: An opportunistic, yet charming music promoter and friend of the von Trapp family.
Herr Zeller: A Nazi official appointed to prepare Austria for political union with Germany.
Baron Elberfeld: A neighbor and friend of Captain von Trapp, he is part of the oldest family in the valley.
Admiral von Schreiber: A German admiral now working with the Nazi party.