Mission Impossible star was 8 months pregnant during fight scene with Tom Cruise

the 43 year old actress, made an appearance on The Tonight Show Starring Jimmy Fallon this week, where she revealed some behind-the-scenes secrets from her time filming

While chatting with Fallon, the star, who shared screen space with Tom Cruise in the film,

Before a clip from the film was shown to the audience, she disclosed, "During this fight sequence - we came back to it a few times to add a few elements to it. And in this clip, I'm actually eight-and-a-half months pregnant."

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, dubbing it "a Fallon exclusive." She continued, "I was taken such good care of. Everyone was so supportive and they were like, 'Oh, you can sit down, and we'll have a stunt double do it'. And I was like, 'No! I've worked too hard. Let me do it.' So I did it, and here it is."

Mission: Impossible – The Final Reckoning which first graced the silver screen in 1996. Atwell joined the franchise as IMF agent Grace in 2023.

Last year, the actress welcomed her first child with her music producer partner Ned Wolfgang Kelly. The pair got engaged in April 2023, with Kelly expressing his joy on at the time, saying, "I'd never had any interest in getting married... until I met this extraordinary woman."

He shared a photo of them together, The British entertainer penned, "Lucky me. Arrived in Venice at 10am. Around midday the love of my life and I got engaged in the kitchen of this peculiar flat full of porcelain ducks, with a bloke outside the window butchering 'My Way' on the accordion. A perfect start to the rest of our lives together."

He explained to Daily Mail that year, "We had rented this Airbnb that had lots of shelves with porcelain ducks on them, so it was quite a surreal setup. My fiancé was in his [underwear] in the kitchen, and there was an accordion playing outside our window - which was timed perfectly but not planned," she confirmed.

Hayley seemingly confirmed that the two have tied the knot in a May 19 episode of LIVE with Kelly and Mark as she referred to the musician as her husband.

The beauty regularly appears on his Instagram account, where he engages a modest audience of about 4,000 followers. He's currently by her side in Cannes, France, supporting her at the Cannes Film Festival, which wraps on Saturday.

Taking to Instagram Stories on Friday he shared a video of the siren walking the red carpet in a midriff-baring black top and matching long skirt.

Ned wrote, "Go watch my amazing wife killing it in The Final Reckoning. The film absolutely rocks."

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