Mr. Forbush and the Penguins

Mr. Forbush and the Penguins, also known as Cry of the Penguins, is a 1971 British film, directed by Arne Sucksdorff, Alfred Viola and Roy Boulting. It stars John Hurt, Hayley Mills, Dudley Sutton and Tony Britton.

Making the film was a turbulent experience. Penguin footage shot by Arne Sucksdorff on location in Antarctica did not cut smoothly into scenes involving humans. Roy Boulting of British Lion replaced director Al Viola, and replaced the female lead with his thenwife, Hayley Mills. John Hurt was angry at this and Bryan Forbes of EMI had to spend an entire evening persuading him not to quit.

Source: Wikipedia