Cillian Murphy Dieted so Hard for 'Oppenheimer' that He Skipped Cast Dinners

Cillian Murphy Dieted so Hard for 'Oppenheimer' that He Skipped Cast Dinners
Published 10 months ago on Jul 18, 2023

Murphy plays the title role in the upcoming film, which is based on the life of J. Robert Oppenheimer, the scientist who led the Manhattan Project to develop the atomic bomb. In order to accurately portray Oppenheimer's gaunt appearance during the war years, Murphy reportedly lost a significant amount of weight.

In an interview with Entertainment Tonight, Damon and Blunt said that Murphy's diet was so strict that he often skipped cast dinners. "We invited Cillian to dinner every night and he never went," Damon said. "He was losing so much weight for the part that he just didn't eat dinner, ever."

Blunt added that Murphy would sometimes eat "one almond most nights, or a little slice of apple." She said that the weight and "responsibility" of the role prevented Murphy from joining in on the cast's fun activities. "The sheer volume of what he had to take on and shoulder is so monumental," Blunt said. "Of course he didn't want to come and have dinner with us."

"He couldn't," Damon said. "His brain was just too full."

"Oppenheimer" is set to be released in theaters on July 21, 2023.


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