Emily Blunt has revealed her 'Oppenheimer' director Christopher Nolan loves to "gossip".

The 41-year-old actress - who plays Kitty Oppenheimer in the Oscar-nominated atomic bomb epic - says the 53-year-old filmmaker is nothing like what people would expect and is "so understated as a person".

Speaking to Australia's WHO magazine, she said: "Someone calls and says he wants to meet, at which point you put a jetpack on, and you go, you run. His ideas are so vast, and they transcend your normal understanding of things. Maybe that's what pins everyone to their seats, that sense of wonder he elicits in people. And yet he's so understated as a person. He doesn't walk around like this walking brain; he watches Love Actually every year. He loves a gossip. We'd be on set, and I'd be like, 'Chris, did you hear about this thing?' And he goes, 'No. What? Tell me.' He's so wonderful and cool. And I just adore him."

Meanwhile, 'Oppenheimer's lead star Cillian Murphy recently revealed Nolan enlists members of his family to deliver his movie scripts.

The 47-year-old star - who has worked with the director on six films - revealed the scripts are always printed on red paper to ensure they can't be photocopied and the moviemaker ensures secrecy by getting trustworthy relatives to hand-deliver them to his stars if he's unable to do it himself.

The actor told GQ magazine: "So, like, it’s been his mom who’s delivered the script to me before. Or his brother, he’ll go away and come back in three hours.

"Part of it has to do with keeping the story secret before it goes out. But part of it has to do with tradition. They’ve always done it this way, so why stop now? It does add a ritual to it, which I really appreciate. It suits me."