Heath Ledger locked himself in a hotel room for a month to prepare for his iconic role as the Joker in The Dark Knight
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Nicole Kidman is scared of butterflies.
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Clint Eastwood was in a plane which crashed into the sea. He and the pilot escaped the sinking aircraft and swam 3 miles to safety.
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Until he turned 12, Robert Pattinson's elder sisters dressed him up as a girl and introduced him as "Claudia" to strangers.
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Keira Knightley and Natalie Portman looked so much alike on set, not even their own mothers could tell them apart!
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