Aisling Sinead Katie Loftus is a British actress. She began her career as a child actress and gained prominence through her roles in the BBC dramas Five Daughters (2010) and Dive (2010), the play Spur of the Moment, and the film Death of a Superhero (2011).

She has since appeared in the ITV period drama Mr Selfridge (2013–2015), the BBC series War & Peace (2016) and Broken (2017), and the Sky series A Discovery of Witches (2018–2022) and The Midwich Cuckoos (2022). Her performance in the film Property of the State (2016) earned her an IFTA nomination.