Career
Juster started out as a variety show performer, and for a period he ran the theater Edderkoppen. Characterised by his unusually tall, lanky figure and squeeky voice, his signature act was the monologue "Mot normalt". He also acted in several successful comedies on the big screen, notably Den forsvundne pølsemaker (1941), En herre medical bart (1942) and Fjols til fjells (1957).
He was the uncle of one of Norway"s most beloved comedian, the late Rolf Just Nilsen.