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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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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Lindsay Lohan was approached to star in The Hangover, but she declined because the screenplay "had no potential".
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When he was 7, Vin Diesel and some friends broke into a New York theater with intentions to vandalize it. Instead of calling the police, the theater’s artistic director handed them scripts and offered them parts in the upcoming show. This became Diesel’s first acting role.
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Hugh Jackman walked around Comic Con wearing his full Wolverine costume and nobody noticed.
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