In the scenes where the balloon battles inclement weather, the temperature on the soundstage was lowered to a glacial setting and Jones had to dip her hands into buckets of ice water between takes. There was a method to the madness –being physically cold “did something to the eyes,” Jones explains.

“I thought it was fascinating, it makes your eyes look a certain way. And definitely through shooting we were trying to make it look as real as possible,” she adds. “You’re constantly trying to create this illusion of reality and the cold box was very much a part of that. We had rain machines lashing down on us and then wind machines. The physical extremities of this job were like nothing else I’ve ever done.”

Luckily, there’ll be no rain machines or freezing ice water baths on her next project. The actor is currently filming the adaptation of Jojo Moyes’ beloved The Last Letter From Your Lover alongside Shailene Woodley, Joe Alwyn and The Capture’s Callum Turner, a project on which both Jones and Woodley also serve as producers.

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