The star admitted she’d spent a sleepless night worrying about a particular scene in the film which she’d have to be starkers.

‘It was really scary to say es to the movie because I knew the only way to tell the story is if I agreed to really do the scenes and go full Monty,’ 

she told the Today show in Australia on Monday. ‘It took a while to say, “Yes”. And the night before I didn’t sleep at all 

and I was obviously really nervous because it is the actual nightmare of standing in front of a classroom naked.

‘But then after I finished the scene I felt empowered.’

The 27-year-old stars in the new film as Dominika Erogova, a Russian ballerina who is recruited into ‘sparrow school’, 

a Russian intelligence programme in which she trained in the art of seduction and sexual manipulation.

Erogova is sent on a mission to extract secrets from an American CIA agent (Joel Edgerton) but her growing feelings for him soon threatens the whole operation.

The film features scenes of torture, during which the actress has freezing water poured on her body – and Jen admits she’d never been so scared of making a film before in her life.

She said: ‘I was terrified. I don’t think I have ever been so scared of doing a movie before in my life. It was a lot of firsts for me.

‘I was getting water poured on myself. I kept asking for it to be heated up. They said, “No, because then it will steam”.

‘”Cool, so I’m really naked getting freezing cold water poured on me”,’ she joked.

Some of Jen’s worry no doubt stems from the 2014 hacking scandal, which saw the actress become the most targeted star in an iCloud hack, with many intimate pictures of the star – and others including Jennifer, Kirsten Dunst, Kate Upton and Amber Heard –  leaked online.

She admitted in November 2017 that she was ‘still processing’ the hack.

The star recently hit out at those who criticised her for not pairing a slinky Versace dress with coat at a photocall in London with her red sparrow cast mates last week.

Many thought the picture of her in the strappy dress whilst the men wore coats was ‘sexist’, but Jen called their claims of sexism sexist in itself.

On her official Facebook page, Jennifer wrote: ‘Wow. I don’t really know where to get started on this “Jennifer Lawrence wearing a revealing dress in the cold” controversy. This is not only utterly ridiculous, I am extremely offended.

‘That Versace dress was fabulous, you think I’m going to cover that gorgeous dress up with a coat and a scarf? I was outside for 5 minutes. I would have stood in the snow for that dress because I love fashion and that was my choice.’

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Source: Los Angeles Times