Watch The Guest Full Movie Free Online 123Movies. The Guest is a modern dark fable starring Olivia Williams (Rushmore, Sixth Sense, An Education) and with an original score by Tom Hobden of Noah and the Whale. A graduate, Matthieu, turns up to his old professor's dinner party to discover he is the only guest. Marguerite, the professor's wife, ignores her husband in favour of devoting her full attention to Matthieu. As the evening progresses it becomes clear the couple are concealing a dark secret. Matthieu's curiosity gets the better of him.