Peter O'Toole plays Peter Plunkett, the charming yet struggling owner of the castle hotel, who comes up with a scheme to attract guests by pretending it's haunted.
Daryl Hannah portrays Mary Plunkett, Peter's wife, who becomes entangled in the chaos that ensues when the guests believe the castle is truly haunted.
Steve Guttenberg takes on the role of Jack Crawford, an American tourist who gets more than he bargained for when he stays at the castle.
Beverly D'Angelo plays Sharon Brogan Crawford, Jack's wife and a skeptical guest at the castle who becomes involved in the supernatural occurrences.
Jennifer Tilly portrays Miranda, a seductive ghost haunting the castle who causes mischief among the living guests.
Liam Neeson embodies the role of Martin Brogan, a resident ghost who has his own reasons for wanting to scare off the living visitors.
Peter Gallagher appears as Brother Tony, a monk visiting the castle who becomes caught up in the ghostly antics and mysteries surrounding the place.
Martin Ferrero plays Malcolm, a handyman working at the castle who gets caught in the middle of the chaos between the living and the dead.
Donal McCann portrays Eamon, a local Irishman who knows the secrets of the castle and its spectral inhabitants.
Liz Smith appears as Mrs. Plunkett, Peter's mother, who adds to the comedic chaos with her own eccentricities.
Mary Coughlan plays Katie, a local waitress at the castle who witnesses the supernatural events unfolding around her.
Tom Hickey portrays Sampson, a long-time employee at the castle who is both loyal to Peter and wary of the ghostly occurrences happening.
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