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American actress Patty Duke taking a break from filming on the set of 'Valley of the Dolls', 24th April 1967. (Photo by Harry Benson/Express/Hulton Archive/Getty Images)

American actress Patty Duke taking a break from filming on the set of 'Valley of the Dolls', 24th April 1967. (Photo by Harry Benson/Express/Hulton Archive/Getty Images)