Marrowbone is a 2017 English-language Spanish psychological horror mystery drama film written and directed by Sergio G. Sánchez, and starring George MacKay, Anya Taylor-Joy, Charlie Heaton, Mia Goth, and Matthew Stagg. The film tells the story of the titular Marrowbone siblings, who relocate from England to their mother's ancestral estate in Maine, where they are faced by a sinister presence at home. Marrowbone was screened in the Special Presentations section at the 2017 Toronto International Film Festival and released in Spain on 27 October 2017 by Universal Pictures.

George Andrew J. MacKay is a British actor. He began his career as a child actor in Peter Pan (2003). He had starring roles in the British war drama Private Peaceful (2012), the romantic film How I Live Now (2013), For Those in Peril (2013), for which he won a BAFTA Scotland Award and was nominated for the BAFTA Rising Star Award, and Marrowbone (2017). He gained wider recognition for his leading role in the war film 1917 (2019).