Santa Claus has asked children across Ireland to behave this Christmas Eve and remain on the good list as he set off from the North Pole this afternoon.
In a special message, Santa said he ho-ho-hopes all the boys and girls in Ireland will go to bed early tonight to ensure he can leave presents under the tree without any difficulty.
Santa told Independent.ie: "My magical elves have been working very, very hard and we've almost finished the sleigh, which means that we'll be heading off, delivering toys all over the world.
"It's a long, long journey, but I have to find every boy and girl, and make sure that I bring you whatever I can.
"Now I hope that you do what I've asked and stay on the good list.
"Go to bed early for Mammy and Daddy, so I can leave your presents and be nice to each other and as I said, I promise you I'll bring whatever I can."
Santa will make a 24-hour journey across the world today, as the country prepares for a calm, clear and cold night for his sleigh ride.
Met Eireann Forecaster Liz Walsh told Independent.ie; "Temperatures could drop as low as minus two degrees overnight.
"It'll be a cold and frosty start for many on Christmas Day, with crisp sunny spells in east and northern areas.
"There will be cloudier conditions in the west and south-west. It is, however, mostly dry.
"From Christmas night, there will be milder temperatures felt throughout the rest of the week."
Meanwhile, the Department of Transport have confirmed that Civil Air Ireland have granted Santa authorisation for 'multi-point landings' across Ireland in a 'low flying sleigh'.
Minister for Transport, Tourism and Sport, Shane Ross said he informed both Santa and Mrs Claus of the decision this morning, and has issued permits for Santa's reindeer to fly into Ireland from 5pm today.
He said: "Santa and Mrs Claus called me this morning and I was happy to inform them that the Claus family’s famous electric Christmas Sleigh has been granted permission to enter Irish air space from 5pm this evening.
"Permits have been issued for Rudolf, Dasher. Prancer. Dancer, Vixen, Comet, Cupid, Donner and Blitzen. There were concerns that Blitzen had sustained a knee injury in last week’s World Reindeer Sleigh-pulling Championship (held annually in Helsinki and won this year by Iceland), but the North Pole vet has checked him out and ruled him fit to fly.
"In addition, my aviation chiefs have assured me that the sleigh has been checked (twice) and is fully air-worthy and ready to circumnavigate the globe."