Cricketer Shikhar Dhawan wrote: "Happy Halloween everyone. Am proud to show you my daughter Rhea's costume which she made and designed herself!!! Proud of her creativity and talent!!"
Ex-Australia cricket captain Michael Clarke posted a picture of his daughter Kelsey Lee and wrote: "Trick or Treat."
German footballer Kevin Trapp's partner Izabel Goulart posted this picture with a caption: "Fund Fair Fabulous #nyc #fundfair #halloween #fridakahlo @nakedheartfoundation @amfar #photo @afinsky."
British tennis star Heather Watson (second from right) poses with her friends
Bazil's star striker Neymar Jr colours his hair green
US boxing great Floyd Mayweather was beyond recognition as the Riddler from Batman
US golfer Luke Donald posted this picture with his family and captioned it: "Happy Halloween from the Donalds #Maui #3Moanas #Tefiti #Hayhay #thingsyoudoforyourkids."
Cleveland Cavaliers star LeBron James posted his picture and captioned it: "Georgie!! Georgie!! #HappyHalloweenFolks."
US Mixed Martial Artist (MMA) ace Frank Edgar posed with his family and wished his social media followers: "Happy Halloween from the Edgar's!!"
NBA star Stephen Curry posted a video and said: "Hello, I want to play a game. #Jigsaw #DubNation."
Posing with his friends, Bayern Munich's Jerome Boateng asked: "What are you doing for #Halloween this year?"
WWEâstar Paige is all decked up
Former Liverpool star Luis Garcia posted this picture and wrote: "Ghosts will be Ghosts !! Happy Halloween everybody!!"