Marilyn Monroe’s most iconic moment — standing over a subway grate as her white dress billows up — was originally filmed in Manhattan in 1954. But a crowd of onlookers forced the producers to reshoot the scene in a Hollywood sound stage, and footage from that night was thought to be lost forever. Until now. Bonnie Siegler, a graphic designer in New York, tells Kurt how she discovered the film — hidden in her grandfather’s house for over 60 years — that captured the moment that became synonymous with Marilyn Monroe.

Watch a clip of the lost footage at The New York Times

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