Santa Claus has set off to deliver Christmas presents to children around the world, with his helpers giving him a musical send-off at his Lapland home as he embarks on the mammoth trip.

Families gathered in temperatures of -22 degrees Celsius on Sunday night in Rovaniemi, which calls itself Santa's official hometown, near the Arctic Circle as his helpers put on a song-and-dance performance to wish him luck.

Santa briefly spoke to the crowd, wishing them a peaceful and happy Christmas before leaving on a sleigh to stock it up with presents for his Christmas Eve journey.

"Hope you all have had a great year. Of course, there have been many things in the world that should have been different," he said in English.

"Hopefully, Christmas would bring a little moment when the world and its people would calm down for a while to spend time with family and friends."

Follow Santa's journey with the help of Nasa here.