Marli Siu (马里·蕭) (born 11 March 1993) is a Scottish-Chinese actress. Her films include Anna and the Apocalypse (2017), Our Ladies (2019), and Run (2019), the latter of which won her a Scottish BAFTA. On television, Siu has appeared in the spy thriller Alex Rider (2020–2024) and the BBC drama Everything I Know About Love (2022).