The Haunting of M is an American 1979 independent horror film[2] directed by Anna Thomas[3][4] and starring Sheelagh Gilbey, Nini Pitt, Evie Garratt, Alan Hay, and Jo Scott Matthews.

[5] This is the only film directed by Thomas, with her husband Gregory Nava acting as a cinematographer.

Thomas shot the film in a castle in Scotland inviting a little known cast.

Their estate gets haunted by the ghost of a young man that wanders through the corridors, tormenting Marianne.

[9] Roger Ebert praised The Haunting of M in his review for The Chicago Sun Times and on an episode of Sneak Previews with fellow film critic Gene Siskel (who disagreed with Ebert's enthusiastic praise for the film).