The One Direction stars treated two competition winners to a slap-up meal at the Soho Sanctum Hotel in London on Tuesday evening (18.03.14) thanks to Trekstock Charity, which supports young people affected by cancer.
The boys said in a joint statement on the charity's website: "It's something we've never, ever done before. We'll fly one grand-prize winner and a friend from wherever they are in the world, and they'll spend three nights at an exclusive hotel in Central London.
"They'll also receive £500 in vouchers to spend on London's famous Carnaby Street before joining us both for an evening out!"
Harry and Liam happily posed for photos with the lucky winners, and were predictably mobbed by a crowd of superfans as they arrived at the swanky location.
The curly-haired 'Midnight Memories' singer wrote on Twitter earlier in the evening: "I'm meeting up with pals from @trekstock later... See you in a bittt .x (sic)"
Meanwhile, Liam teased in the weeks beforehand: "Only a few weeks until we meet two of our amazing fans in London with @trekstock. Excitinggggggg!!!!! #HangWithLiamAndHarry."
Trekstock launched in March 2010 and aims to raise funds to beat cancer as well as promoting awareness via music, fashion, art and trekking expeditions.