<ul><li>This year at the movies, there have been several films featuring stars acting opposite themselves.</li><li>The use of doubling in films has evolved over the years, starting from the silent era with Buster Keaton's 'The Playhouse' (1921).</li><li>In 'The Playhouse,' Keaton accomplished the effect of appearing as multiple characters through masking and double exposure.</li><li>Another notable film that employed doubling is 'The Parent Trap' (1961), which used split-screen technology for high jinks.</li></ul>

Doubling Up: How ‘Sinners’ and Other Movies Multiply One Actor

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