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In page Jens Müller (pilot):

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Müller was born in Shanghai, China, the son of Norwegian engineer Einar Jønsberg Müller (1872–1943) and British actress Daisy Constance Russell (1891–1978). Jens Müller had one brother, the Norwegian movie director Nils R. Müller. The brothers grew up in Aker, Norway. Müller had already received a pilot's license at age eighteen in 1935. Müller was studying in Zurich when World War II broke out. In May 1940 he arrived in England.