Cillian Murphy, Robert Downey Jr, Emily Blunt, and Christopher Nolan, on Tuesday, attended the grand premiere of their film Oppenheimer at the Cinema Le Grand Rex in Paris. According to Variety, a US-based media outlet, as the three-hour historical epic was about to begin, Nolan warned the audience that “it’s an intense experience, it’s a serious subject, but it’s something we pulled our hearts into.” The movie delves into the creation of the atomic bomb during World War II. Oppenheimer Review: Christopher Nolan's Film Starring Cillian Murphy and Robert Downey Jr Is 'Spectacular' and 'Electrifying', Per First Reactions.

Cast of Oppenheimer at Premiere

More Celebs Attend OP

Dir Christopher Nolan Arrives

Star Of Oppenheimer 

Cillian Talks About His Mum

Nolan's Speech at Premiere 

Downey Jr., who arrived on the red carpet looking as sleek and fashionable as Tony Stark, said Oppenheimer stands out from his past films. “I’ve done a lot of movies where it kind of becomes about aliens and bad guys and action and flying around. But this is a blockbuster about our history as human beings. And it’s just amazing how he pulled it off,” said Downey Jr. who owes his huge popularity in France to his turn in Iron Man and The Avengers. He said Oppenheimer is a “blockbuster movie that is about something so intimate and so important,” as per Variety. Oppenheimer: Christopher Nolan Confirms Movie Has Zero CGI, Opens Up On the Making of Film On First Atomic Bomb.

Murphy, who plays J. Robert Oppenheimer, an American theoretical physicist, kept a low profile on the red carpet. Blunt, who looked beautiful in a silk gown, said it was an "extraordinary set, fully immersive, which is what Chris adores to do, so you feel kidnapped by the experience as an actor," reported Variety. The biopic, set during World War II, follows Oppenheimer, known as the "Father of the Atomic Bomb," during a period in history when he understood that testing the atomic bomb would ignite the atmosphere and destroy the world, yet he pushed the button anyway.