Hannah Dominique John-Kamen is a British 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), and has portrayed Ava Starr / Ghost in the Marvel Cinematic Universe. She has also starred in various films including SAS: Red Notice (2021), Resident Evil: Welcome to Raccoon City (2021) and Unwelcome (2023).