My go-to movie to get me in the Christmas spirit is, aptly, a ghost story: The Amazing Mr Blunden. I first saw this when I was at junior school - it was such a treat to gather in the assembly hall and watch a film instead of doing schoolwork!
Two children were killed in a fire at the mansion one hundred years ago and Mr Blunden wants Jamie and Lucy's help in making amends for that fateful night.
I love, love, love this film. The cast are perfect, the setting is so atmospheric and the incidental music totally adds to the mood of each scene.
Incidentally, the film is based on a book (see, it's not just recent books like Harry Potter or Twilight that have made it to the big screen). The Ghosts is by Antonia Barber, and I managed to track down my very own copy of couple of years ago.
What's your favourite movie to watch at Christmas?