After graduating from high school, Koller first went through a four-year apprenticeship as a precision toolmaker and then, after three years of training at the Academy of Drama in Zurich, Switzerland, graduated as an actor/director. The next several years he spent acting and directing at German and Swiss theatres. He did a number of TV-plays as an actor, directed commercials, acted in movies, and then started to write and direct feature films.
Film career
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Awards and accolades
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