Without a doubt, the most underrated ghost movie on this planet is the delightful comedy/horror flick High Spirits. The film follows a group of misfit hotel employees (led by Peter O'Toole) who try to attempt to save their ancient castle hotel by advertising it as the most haunted castle on the emerald isle.

But as the con unfolds, tourist Jack Crawford (Steve Guttenberg) unwittingly stumbles across real ghosts, and gets entangled in the ghostly cure of Mary Plunkett Brogan (played by the poorly accented but incredibly stunning Daryl Hannah), who is doomed to spend eternity reliving her wedding night where she's murdered by the handsome and gigantic ginger, Martin Brogan (Liam Neeson).

But instead of dwelling on a centuries-old murder, Jack and Mary fall in love. And Neeson becomes infatuated with Jack's angry spouse.

Ghost sex jokes fly — they refer to it as "scalping" — and Neeson shows up to brag about his giant ghost cock! If you haven't seen High Spirits we demand you download it on iTunes immediately.