John Lewis releases heartwarming Christmas advert and it is giving us major ET flashbacks

British department store John Lewis is famed for its Christmas adverts - and this year's version carries on the retailer's tradition of heartwarming tales.

Titled 'Unexpected Guest,' the advert gives us major ET flashbacks as it follows a young boy called Nathan and a space traveller, Skye.

Nathan discovers Skye, who has landed in the woods near his home. Their friendship develops as Nathan introduces Skye to his family's festive traditions.

They decorate the tree with fairy lights, she tries her first mince pie, and he introduces her to the joy of giving presents by gifting her his Christmas jumper.

The advert is set to a cover of Philip Oakey & Giorgio Moroder's 'Together in Electric Dreams' by British singer-songwriter Lola Young.

A version of Nathan's Christmas jumper in the advert will be available in John Lewis shops, with 10% of the profits for each jumper sold going equally to the Give a Little Love charities FareShare and Home-Start UK.