Nathaniel Curtis is a British television and theatre actor. He is known for his role as Ash Mukherjee in the 2021 five-part series It's a Sin (TV series) and The Witcher: Blood Origin (TV series) premiering in 2022. He grew up near Bournemouth and trained at London's East 15 Acting School. After five years of struggling to find work, his breakthrough role came playing Ash Mukherjee in It's a Sin, Russell T Davies' series about a group of gay friends growing up in the shadow of Aids in 1980s London.