Cordelia is a 2019 British psychological thriller directed by Adrian Shergold, co-written with lead actress Antonia Campbell-Hughes. The film delves into themes of trauma, isolation, and the blurred lines between reality and delusion.

Set in contemporary London, the story follows Cordelia (Antonia Campbell-Hughes), a young actress grappling with the aftermath of a traumatic event, implied to be the 7/7 London bombings. She resides in a basement flat with her twin sister, Caroline (also portrayed by Campbell-Hughes). When Caroline departs for the weekend, Cordelia is left alone and becomes increasingly unsettled by her enigmatic upstairs neighbor, Frank (Johnny Flynn), a cellist whose intentions are ambiguous. As their interactions intensify, Cordelia’s grip on reality begins to waver, leading her to confront haunting memories and psychological distress.

Critics highlighted the film’s atmospheric tension and Campbell-Hughes’s performance, though some pointed to its ambiguous narrative as a potential drawback.