Models Heidi Klum and Jodie Kidd were among the celebrities who put serious effort into their Halloween costumes this year.
Hundreds of ghostly sightings have been reported on the A75 in Dumfries and Galloway
Owners of the ancient Ram Inn at Wotton-under-Edge in Gloucestershire say that virtually every room in the house has its own ghost.
Newsnight's reputation for being a serious political programme could be under threat after presenter Kirsty Wark ended the show by dancing to Michael Jackson's Thriller.
Performers from the Tiffany Theatre College gave their rendition of the famous dance alongside the presenter.
Newsnight also added to the spooky theme by changing their editor's name from Ian Katz to Ian Batz in the credits.
A Tottenham Hotspur player decided to play a Halloween prank on his teammates by dressing up as the Grim Reaper and jumping out on them.
Players including Andros Townsend, Emmanuel Adebayor and Jermian Defoe were brought into a Spurs TV interview room, which was decorated with spooky paraphernalia.
The camera crew and interviewer left the room only for Tottenham defender Kyle Walker, wearing a scary mask, to shock them.
Walker, who declared in the video "I'm always on the front line of banter", left some players so scared that they fell to the floor shouting out expletives.
However, defender Jan Vertonghen lived up to his reputation as a tough player by not even flinching when the England international played the prank on him.
US President Barack Obama and First Lady Michelle Obama hosted a children's Halloween party on the lawn of the White House in Washington.
During the party the couple distributed treats to children dressed up in an array of spooky costumes.
The Deputy Prime Minister met youngsters at London's Great Ormond Street Hospital today during a special Halloween bash.
Nick Clegg, who was joined by his wife Miriam Gonzalez Durantez, later tweeted: 'Amazing to join the fun and games with staff, patients, families and volunteers at the GOSH Halloween party'.
Witches' hats and capes will come in useful if you're trick-or-treating this evening.
There will be wet weather from time to time in many locations, as well as blustery winds - particularly in northern and western counties.
Most of the Midlands, Lincolnshire, Yorkshire, Durham, Tyne and Wear and Northumberland will get away with drier conditions.
It will also get dark earlier with more cloud cover this afternoon - so don't forget the torches!
Even the Queen is getting into the Halloween spirit - she has been meeting children baking spooky treats during a visit to a new hostel in East Sussex.
The Queen and the Duke of Edinburgh have visited several locations in the county today as they carry out a series of royal engagements.