One Direction attended a charity screening of their 'This Is Us' movie as a four-piece earlier this week when Zayn Malik was struck down by sickness, leaving him unable to make it to the special day.
Niall Horan, Harry Styles, Liam Payne and Louis Tomlinson surprised fans by performing an impromptu gig at the event, organised by Rays Of Sunshine who grant wishes for seriously ill youngsters in the UK.
The 'What Makes You Beautiful' singers, who are patrons of the charity, jumped at the chance to team up with Rays Of Sunshine and bring some festive cheer, merrily sporting Father Christmas hats and spending time with some of the children.
1D meet 36 kids and their excited families, before joining them at a screening of 'The Is Us' and then launching into a short impromptu set including an acoustic rendition of 'What Makes You Beautiful'.
The charity posted plenty of cute snaps on their Twitter account, praising the kind-hearted lads for their charitable nature. “@onedirection you were unbelievable today! thank you so much 4 making wishes come true 4 so many inspirational children amazing ambassadors,” they wrote.
Harry, Niall, Liam and Zayn also held a Q&A session for the young fans after the screening, before meeting them and posing for pictures. All children attending were also a special bag full of Christmas goodies including a signed One Direction T-shirt, watch and two tickets to their 2014 'Where We Are' tour. 'Britain's Got Talent' band The Luminites were also on hand to meet and greet the youngsters.
One Direction are currently taking some well-earned time off over the festive period and appear to be getting ready to spend Christmas with their families in the UK and Ireland. Their concert movie 'This Is Us' is released this week, just in time for Directioners to scoop a copy before Christmas Day.
The 'Story Of My Life' singers also look set to hold the number one album spot during the Christmas week after the midweek chart update revealed 'Midnight Memories' is currently outselling this week's number one, Robbie Williams' 'Swing Both Ways'.