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(Photo : Photo by Eamonn M. McCormack/Getty Images for Universal Pictures)
LONDON, ENGLAND - JULY 13: (L-R) Emily Blunt and Cillian Murphy attend the UK Premiere of "Oppenheimer" at Odeon Luxe Leicester Square on July 13, 2023 in London, England.

Emily Blunt publicly apologized to her 'Oppenheimer' co-star Cillian Murphy for inadvertently injuring him during a scene that ultimately didn't make it into the final cut of the film.

In a conversation with 'The Sun,' Blunt, who portrayed Robert Oppenheimer's wife Katherine, detailed how she had to repeatedly slap Murphy. Uncertain about the force, she had both director Christopher Nolan and Murphy, 47, encouraging her during the intense moment.

(Photo : Photo by Gareth Cattermole/Getty Images)
LONDON, ENGLAND - JULY 13: (L-R) Emily Blunt, Cillian Murphy and Florence Pugh attend the "Oppenheimer" UK Premiere at Odeon Luxe Leicester Square on July 13, 2023 in London, England.

"Sorry about your cheekbone, Cillian," said the 40-year-old actress.

She shared how Nolan urged her to hit co-star Murphy during a scene before grabbing him by the collar after being initially hesitant. Reflecting on the scene, Blunt humorously remembered, "Over ten takes, that very famous cheekbone became even more prominent — and it's not even in the movie."

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Meanwhile, Murphy, who portrayed the wartime scientist in the blockbuster film, recently received a Golden Globe for his compelling performance grappling with the moral complexities of developing the atomic bomb.

(Photo : Photo by Gareth Cattermole/Getty Images)
LONDON, ENGLAND - JULY 13: (L-R) Emily Blunt and Cillian Murphy attend the "Oppenheimer" UK Premiere at Odeon Luxe Leicester Square on July 13, 2023 in London, England.

Blunt praised Murphy, affectionately calling him "Mr. Ocean Eyes" and expressing admiration for his captivating and "mesmerizing" performance in 'Oppenheimer.'

"He was an amazing scene partner," she said of Murphy. "... He's a wonderful friend. He's captivating. He's mesmerizing in this role. Everything was such a masterclass watching him."

Both actors, nominated for Oscars, have received critical acclaim for their roles in the the movie. The film leads with 13 Oscar nods, including nominations for Best Director and Best Film.