New Delhi, May 24 -- Actor Hayley Atwell has stunned fans with a behind-the-scenes revelation about her time on Mission: Impossible - The Final Reckoning.

In a recent appearance on The Tonight Show Starring Jimmy Fallon, the British star shared that she was heavily pregnant during one of the film's key action sequences.

While discussing the intense fight choreography featured in the film, Hayley Atwell, who plays Grace in the franchise, casually dropped the surprise during her chat with Fallon.

"During this fight sequence, we came back to it a few times to add a few elements to it," she explained this week on The Tonight Show Starring Jimmy Fallon. "And in this clip, I'm actually eight and a half months pregnant."

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