 She made her stage debut in 1913, and was appearing in "Medora" at the Alhambra Theatre in Leicester Square when T. A. Welsh and Pearson saw and signed her for "Nothing Else Matters" in 1920.After replacing Gertrude Lawrence on stage in "The Midnight Follies", Balfour was back with Pearson with her first starring role in "Mary Find the Gold".In 1916 she starred in Fred Karno's all female revue, 'All Women,' notable at the time for its all female cast, including stage manager, musical director and advanced agent.