Other big names from the world of sport including Steph Curry and Jerome Boateng got in on the act with some incredible costumes

THE SCARIEST day of the year is upon us once again and sports stars from around the world have got into the Halloween spirit with some truly chilling fancy dress.

Top award must go to Cleveland Cavaliers star LeBron James with his incredible transformation into Stephen King’s killer clown IT.

16LeBron James wins the best dressed award for his killer clown ITCredit: Instagram @kingjames

It’s all there – the sinister smile, the abnormally large forehead and even the creepy red balloons.

Perhaps the only giveaway to his identity was the fact the 6ft 8ins small forward had to crouch down for the photo.

Equally freaky was Floyd Mayweather striking a pose as evil genius the Riddler from Batman.

The retired boxer with the 50-0 record looked slightly dressed down from his normal outlandish attire.

16Floyd Mayweather was unrecognisable as the RiddlerCredit: Instagram16The retired boxer left no stone unturned with his brilliant outfitCredit: Instagram16Would you have known who this was without any clues?Credit: Instagram

But he pulled out all the stops – complete with the question mark suit and purple gloves – to show his 19.4million Instagram followers how seriously he takes Halloween.

Prior to that Mayweather dressed up as Achilles from Troy – or Maximus from Gladiator – and Sylvester the cat.

Golden State Warriors star man Steph Curry pulled out all the stops as Jigsaw from the Saw films, even riding the tricycle.

While not strictly Halloween, Eugenie Bouchard looked incredible in a Baywatch-inspired red swimsuit.

Eugenie Bouchard in her Baywatch-inspired swimsuitCredit: Instagram

Floyd Mayweather as Sylvester the CatCredit: Instagram16Did the 50-0 boxer look more suited in the warrior get-up?Credit: Instagram

Luke Donald and his family went to a lot of effort with their costumesCredit: Instagram

And fellow blonde Paige Spiranac dressed up her dog as a pirate, which, oddly, really seemed to suit the mutt.

World’s most expensive footballer Neymar is no stranger to garish hairstyles but he joined the fun by dying his barnet green.

And Bayern Munich Jerome Boateng looked brilliant with his skull facepaint and smart suit.

16Neymar dyed his hair green for HalloweenCredit: Instagram16Jerome Boateng looked brilliant in his Halloween outfitCredit: Instagram @jeromeboateng16Cleveland Cavaliers star Isaiah Thomas looked like he belonged in rap group NWACredit: Instagram16Heather Watson with her white hairCredit: Instagram16The Brit tennis star certainly caught the eye with her lookCredit: Instagram16UFC ring girl Britney Palmer gets dressed up for HalloweenCredit: Instagram16Frankie Edgar looked suitably spooky with his familyCredit: Instagram

NBA star Isaiah Thomas looked the part as Easy E from rap group NWA and Brit tennis star Heather Watson looked eye-catching with bright white hair.

UFC ring girl Britney Palmer struck a smile in her costume and former UFC lightweight champ Frankie Edgar looked the part with his family.