Stacy Martin is a French actress. Her breakthrough role was playing Joe as a young woman in Lars von Trier's 2013 drama film Nymphomaniac. She is a frequent collaborator with Brady Corbet, having appeared in his films The Childhood of a Leader (2015), Vox Lux (2018), and The Brutalist (2024). Her other credits include All the Money in the World (2017), Amanda (2018), The Evening Hour (2020), Lovers (2020), and The Serpent (2021).