 In 1930, she left the Royal Dramatic Theater and moved to Gösta Ekman's Lorensbergsteatern in Göteborg.In the silent comedy "I kantonnement" (In the cantonment, 1932) directed by Lau Lauritzen, Sr., she starred opposite the comic duo "Fi og By" (Carl Schenstrøm and Harald Madsen).Mårtenson continued her film career into the sound era with "I nöd och lust" (In Sickness and Health, 1938) directed by Ivar Johansson and in the drama "Västkustens hjältar" (West Coast Heroes, 1940) directed by Lau Lauritzen and Alice O'Fredericks as the mother of the hero played by Fritiof Billquist.