<Li> Murvyn Vye as Dave Colby </Li> <P> Otto Preminger was preparing for the opening of The Moon Is Blue when 20th Century Fox executive Darryl F. Zanuck assigned him to direct River of No Return as part of his contract with the studio . Because of their previous experience with Westerns, producer Stanley Rubin had wanted William Wellman, Raoul Walsh, or Henry King to helm the film, and he was concerned Preminger, who he felt was better suited for film noir melodrama or sophisticated comedy, would be unable to rise to the task of directing a piece of Americana . Preminger himself had no interest in the project until he read the screenplay and saw potential in the story . He also approved of Robert Mitchum and Marilyn Monroe, who already had been cast in the lead roles . </P> <P> Zanuck decided the film should be made in CinemaScope and increased the budget accordingly . Much of it would be filmed in Banff and Jasper National Parks and Lake Louise in Alberta, and Preminger and Rubin flew to the area to scout locations . During their time there, Rubin grew fond of the director and began to feel that rather than viewing it as a contractual obligation, Preminger had a real interest in making the film . </P> <P> Rubin scheduled twelve weeks of preproduction, during which Monroe rehearsed and recorded the musical numbers written by Ken Darby and Lionel Newman, and forty - five days for filming . </P>

Where was the movie river of no return filmed
find me the text answering this question