Irina Demick (16 October 1936, Pommeuse, Seine-et-Marne - 8 October 2004), sometimes credited as Irina Demich was a French actress with a brief career in American films.

Born Irina Dziemiach, apparently of Slavic (Russian, Ukrainian, or Polish) and polish Jewish ancestry, in Pommeuse, Seine-et-Marne, she went to Paris and became a model. She made an appearance in a French film Julie la rousse (1959) and met producer Darryl F. Zanuck. Zanuck, whose lover she became, cast her in his epic production, The Longest Day as a French resistance fighter. Her career continued with roles in OSS se déchaine (1963), The Visit (1964), alongside Ingrid Bergman and Anthony Quinn, Un monsieur de compagnie (1964) with Catherine Deneuve and Jean-Pierre Cassel and Up from the Beach (1965) opposite Cliff Robertson and Red Buttons. In 1965, she played seven roles in Those Magnificent Men in Their Flying Machines, each one of a different nationality.

After making a few more films, Prudence and the Pill (1968), Le Clan des Siciliens (The Sicilian Clan), with Jean Gabin and Alain Delon mostly in France and Italy, Demick's career faded and came to a standstill in 1972.

She died in Indianapolis, Indiana.

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