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With his distinctive fake moustache, he starred with the iconic duo in 33 of their films and later became the inspiration for Homer Simpson's "D'oh!" catchphrase.

He now speaks with a broad Australian accent, has a thick moustache and addressed the media with his cap backwards and sliders on his feet.

"A false moustache or beard is easily detected, especially under the high lights of a restaurant, pub, or in a tube train," reads a booklet provided to agents during World War Two.

Chalamet, sporting a moustache, said: "Getting to study and immerse myself in the world of Bob Dylan has been the greatest education a young artist can receive."

He was disguised behind a face mask and hat and had created a fake ID in which he had tanned his skin and wore a black wig with a false beard and moustache.