Mowinckel played "Lady Inger" at Centralteatret for the Ibsen jubilée in 1928.Gjesdahl 1964: p. 168 In May 1928 she produced Vesaas' play Frå fest til fest for Det Norske Teatret,Dalgard 1963: p. 126 and O'Casey's Plogen og stjernone in September 1929.Dalgard 1963: p. 133 She played the male character "Thy" in Hamsun's Livets Spill at the opening performance at Det Nye Teater in February 1929,Lyche 1990: p. 109 and directed and played in Ibsen's Et dukkehjem for Det Nye Teater in 1929.Elster 1941: pp. 53–57Rønneberg 1945: pp. 85–87 In 1931 she staged Stuart's comedy Fra ni til seks at Centralteatret.Gjesdahl 1964: p. 190 At Det Norske Teatret in March 1931 she staged an adaptation of Frank's Carl and Anna, in October O'Neill's , and in November 1931 Soini's Syndebukken. In February 1932 she produced Braaten's adaptation of Zuckmayer's play . As advertising they let German "soldiers" patrol the streets, which led to official protests from the German Embassy in Oslo. In May 1932 she produced Martinez Sierra's play Dei spanske nonnone (), in September Langer's Kamelen gjennom nålauga (, in ), and in October 1932 Drabløs' adaptation of Falkberget's Eli Sjursdotter. In February 1933 she produced Glebov's Under Sovjet, and in December Ørjasæter's Anne på Torp.Dalgard 1963: pp. 140–153 In 1933 she staged Gjesdahl's adaptation of Winsloe's play Gestern und heute at Det Nye Teater, a performance which made a strong impression on the public.Skavlan 1960: pp. 39–41
