Melbourne's Luna Park will become Luna Dark this Hallowe'en with a 50 per cent discount on an Unlimited Ride Ticket for anyone in Halloween costume, available from 7pm on Saturday 31 October.

Fun-seekers of all ages are being encouraged to get into the spirit of Halloween by turning up in costume as witches, monsters, cartoon heroes, vampires, ghosts or whatever other ghoulish character pops into their imagination.

While Luna Park's famous Ghost Train will be a popular attraction on the night, there will be plenty of other ways to scream your head off with unlimited frighteningly fun rides on the Pharaoh's Curse, the Spider, the Shock Drop and many more.

Luna Park always looks its best under lights and on Halloween evening, the atmosphere is always especially exciting. Perhaps the legendary and unexplained Joker Ghost who haunted the park in the early 1900s will make a surprise return.

Everyone who turns up in costume on the night will have the opportunity to be photographed to enter the competition for Best Costume.

Winners in the three age group categories will win a 12 Month Unlimited Ride Pass to Luna Park. Guests will also have the option to purchase their souvenir photo as a memento of their night at Luna Dark.