Stacy Martin (born 20 March 1990) is a French actress. Her breakthrough role was playing Joe as a young woman in Lars von Trier's 2013 drama film Nymphomaniac. Other credits include The Childhood of a Leader (2015), All the Money in the World (2017), Amanda (2018), The Evening Hour (2020), Lovers (2020), and The Serpent (2021).

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