More than 50 years after her heart-breaking early death, Marilyn Monroe remains one of Hollywood’s biggest stars. Fans still fixate over her movie roles in classics like Some Like It Hot, and any piece of her mementos instantly becomes a part of Hollywood history.

But behind the fascination, Monroe’s life was anything but perfect. Her struggles with 3 marriages, drug addiction and unfaithfulness make her seem much more human than any other Hollywood star.

One of the most enlightening looks into her short life comes from the love letters in her “lost archives,” a collection of never-before-seen letters and souvenirs she left to her acting coach Lee Strasberg after her death.

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Among the many stars who sent letters to Monroe – as well as Cary Grant, Jane Russell and Marlon Brando – was her second husband, New York Yankees player Joe DiMaggio.