Astrid Allwyn was an American stage and film actress.
She studied dancing and dramatics in New York and later joined a stock company. Allwyn made her Broadway debut in 1929 in Elmer Rice's Street Scene. On the strength of her performance in Once in a Lifetime, she was given film work. In films, she often played the woman from whom the male star escaped, for example Charles Boyer's character's fiancé in the 1939 version of Love Affair or James Stewart's in Mr. Smith Goes to Washington.