 In the early 1940s, Viby made two popular comedies with the directing duo of Alice O'Fredericks and Lau Lauritzen Jr. -- "Frøken Kirkemus" ("Mrs. Churchmouse") and "Frøken Vildkat" ("Mrs. Wildcat").The style of direction—quick light-hearted banter similar to American screw-ball comedies—was better suited to Viby than the heavier exposition of Gregers direction.She quickly became one of the most popular actresses and performed in a string of romantic comedies including "Som du vil ha' mig-!"