"The Night Manager" star voiced the character of Mopsy in the film and the voice cast also includes James Corden, Daisy Ridley and Margot Robbie.
"The script was really a live beast, and it changed and morphed with Will making changes to it as we went along," Debicki told Collider.
"I think the characters developed... There was an incarnation when Mopsy was into design, which I loved, which I still know to be the truth about her," she added.
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