10. Margot Robbie on Alexander Skarsgård

During the shooting of The Legend of Tarzan, Margot Robbie decided to pull a prank on her co-star Alexander Skarsgård during one particularly serious scene. Knowing his seriousness about not leaving character, Robbie secretly switched his on-set water bottle with one filled with vinegar. Mid-break, when Skarsgård took a sip, he was priceless in his reaction and completely broke the stoic facade. The cast and crew burst out in laughter as Skarsgård attempted to recover from the sour surprise. Robbie later said it was just her way of lightening up the very serious set and proving her more lighthearted side.
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