Hannah Dominique John-Kamen is an English actress. She is known for her television roles in Black Mirror (2011–2016), Killjoys (2015–2019), Brave New World (2020), and Netflix miniseries The Stranger (2020). She has also starred in various films including SAS: Red Notice (2021), Resident Evil: Welcome to Raccoon City (2021) and Unwelcome (2023). She has since portrayed Ava Starr / Ghost in the Marvel Cinematic Universe (MCU) beginning with Ant-Man and the Wasp (2018).