Cillian Murphy playing Robert Oppenheimer is perfect casting
This is actually Cillian Murphy's 2nd time playing a nuclear physicist. He also played a nuclear physicist in the sci-fi movie Sunshine, about a space mission sent to restart the dying sun with a nuclear bomb. In preparation for that role he worked with English physicist Brian Cox to learn about advanced physics, toured the CERN facility and even learned to copy physicists' mannerisms.
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