Matt Damon and Emily Blunt admit they were constantly distracted by Cillian Murphy’s piercing ‘ocean eyes’ while filming Oppenheimer

Cillian Murphy’s co-stars in Oppenheimer have admitted that they were constantly distracted by his piercing deep blue eyes.

Matt Damon, 52, confessed People: ‘It’s a real problem when you’re working on stage with Cillian. Sometimes you find yourself just swimming in her eyes.

Emily Blunt, 40, added: ‘It’s like Billie Eilish’s ‘Ocean Eyes’ song. We hum it all day long,’ to which Cillian, 47, insisted: ‘They’re not even that blue!’

In the film, Cillian plays J. Robert Oppenheimer, an American theoretical physicist credited as the “father of the atomic bomb” for his role in the Manhattan Project, the World War II undertaking that developed the first nuclear weapons.

Emily Blunt takes on the role of Kitty, Oppenheimer’s wife, while Matt Damon plays Lieutenant General Groves, the director of the Manhattan Project who appointed Oppenheimer to oversee the development of the atomic bomb.

Co-stars: In the film, Cillian, 47, plays J. Robert Oppenheimer, the “father of the atomic bomb,” Emily Blunt, 40, takes on the role of his wife Kitty, while Matt Damon, 52, plays Lt. Gen. Groves.

Distracted: Matt told People: ‘It’s a real problem when you’re doing scene work with Cillian. Sometimes you find yourself swimming in her eyes’

Talking with him New York TimesCillian recounted how she took more than five months before filming to prepare both physically and emotionally for the role.

He confessed that he “loved” the physicality of preparing for the role, and said that he wanted to lose weight to give Oppenheimer a “wide-eyed look” to convey the fact that he “never ate”.

He said: “I love performing with my body, and Oppenheimer had a very distinct physique and silhouette, which he wanted to get right.”

‘I had to lose quite a bit of weight, and we worked on costumes and tailoring; he was very thin, almost gaunt, subsisting on martinis and cigarettes.

“She had these really bright eyes and I wanted to give her this wide-eyed look, so we did a lot of work on her silhouette and expressions before we started.”

While in an interview with ExtraEmily, who plays his on-screen wife Kitty, described the “monumental commitment” to lose weight for the role.

She said: ‘He had such a monumental undertaking. And he could only eat, like, one almond every day. He was so haggard.

Mesmerized: Emily added: ‘It’s like Billie Eilish’s ‘Ocean Eyes’ song. We hum it all day,’ to which Cillian, 47, insisted: ‘They’re not even that blue!’

In May, Cillian admitted he was “desperate” to land the lead in Christopher Nolan’s Oppenheimer.

He told the Associated Press: “I’ve always told Chris, in public and in private, that if I’m available and you want me to be in a movie, I’m there.”

‘I don’t really care about the size of the piece. But deep down, secretly, I was desperate to play a leading role for him.

Turns out, Cillian had no idea he was going to get the lead in Oppenheimer until Nolan called him out of the blue and offered him the part.

“He’s so low-key and self-deprecating and, in his very English way, he just said, ‘Listen, I’ve written this script, it’s about Oppenheimer. I wish you were my Oppenheimer,'” Cillian recalled, before adding, ‘It was a great day.’

Christopher previously said the hollywood reporter that it was an obvious decision to cast Cillian in the lead role.

“I’ve been looking at the cover of the American Prometheus book for so many months, and there’s this photograph, black and white, a very intense, light blue eye look of this guy. “And I thought, ‘Well, I know who could do that.'”