Oppenheimer’s Emily Blunt lifts lid on ‘emaciated’ co-star Cillian Murphy’s insane diet

Emily Blunt has lifted the lid on her “emaciated” co-star Cillian Murphy’s eating habits, which he adopted in order to play the film’s titular role.

Cillian Murphy took an extreme approach to dieting in order to transform into scientist J. Robert Oppenheimer for the Christopher Nolan-directed Oppenheimer film.

“He had such a monumental undertaking,” the actor’s onscreen wife, actress Emily Blunt, told Extra in a new interview.

“And he could only eat, like, an almond every day. He was so emaciated.”

Blunt’s comments on Murphy’s pre-filming eating habits bore an eerie resemblance to her famous line in The Devil Wears Prada, where her character, Emily Charlton, tells colleague Andrea Sachs (Anne Hathaway), “I’m on this new diet. Well, I don’t eat anything, and when I feel like I’m about to faint, I eat a cube of cheese.”

Her character then joked, “I’m just one stomach flu away from my goal weight.”

Blunt opened up about her co-star’s strict eating habits on set. Picture: Gareth Cattermole/Getty Images

In Oppenheimer – which hits movie theatres on Thursday – Blunt, 40, plays the role of Oppenheimer’s wife, Kitty.

The famous physicist Murphy portrays has been dubbed the “father of the atomic bomb” and was the director of the Los Alamos Laboratory during World War II.

Murphy, 47, has previously discussed his commitment to weight loss for the movie role.

“I love acting with my body, and Oppenheimer had a very distinct physicality and silhouette, which I wanted to get right,” he told The New York Times in May.

“I had to lose quite a bit of weight, and we worked with the costume and tailoring; he was very slim, almost emaciated, existed on martinis and cigarettes.”

Murphy as the “emaciated” Oppenheimer.

However, Murphy made it clear that his dieting tactics aren’t safe and should not be replicated by others.

“You become competitive with yourself a little bit, which is not healthy,” he told The Guardian in July, adding, “I don’t advise it.”

The Peaky Blinders actor also explained that he didn’t want to disclose what foods his nutritionist suggested he cut out to slim down – or how much weight he lost for the part.

“I don’t want it [the headlines] to be, ‘Cillian lost X weight for the part’,” he admitted.

Blunt also made headlines last week when she announced she was taking a step back from her acting career to spend more time with her family.

“This year, I’m not working. I worked quite a bit last year and my oldest baby is 9, so we’re in the last year of single digits,” she said during an interview on iHeart’s Table For Two with Bruce Bozzi podcast.

Blunt later clarified that reactions to her acting break were “overblown” and that she’s just taking a few months off to spent time with her husband, John Krasinski, and their two daughters: Hazel, 9, and Violet, 6.

“I was just taking some downtime — not quitting Hollywood,” she said at the London premiere of Oppenheimer.

This article originally appeared in Page Six and was reproduced with permission.

Originally published as Oppenheimer’s Emily Blunt lifts lid on ‘emaciated’ co-star Cillian Murphy’s insane diet