Sonoya Mizuno (born 1 July 1986) is a Japanese and English actress. She is known for her collaborations with Alex Garland — most notably, portraying Kyoko in the film Ex Machina (2014) and starring in the FX miniseries Devs (2020) — as well as for her roles in the Netflix series Maniac (2018), the HBO series House of the Dragon (2022–present), and the film Crazy Rich Asians (2018).