Tom Hiddleston, Jemima Khan, Daisy Lowe, Hugh Grant and Nigella Lawson are already involved in the campaign.
Jemima Khan has kickstarted UNICEF's #wakeupcall, a new social media campaign to help raise money for Syrian refugees.
Following in the hugely successful footsteps of the Ice Bucket Challenge, which saw every celebrity you've ever heard of being soaked with icey water, this campaign aims create awareness and raise money for Unicef’s Syria Emergency Fund.
Writing in the New Statesman, Jemima, a UNICEF ambassador, said: 'I considered asking friends to donate money not to have to attend another dreary charity dinner, but have decided that the quickest way to raise money is through a social media campaign – to try to replicate the astonishing success of the Ice Bucket Challenge.'
To take part in the #wakeupcall campaign you need to post an early-morning selfie on social media and donate to Unicef's Wake Up Call campaign to help thousands of Syrians who have fled from violence in their country.
The Ice Bucket Challenge managed to raise $100 million for Amyotrophic Lateral Sclerosis (referred to as Motor Neurone Disease in the UK), so here's hoping this campaign takes off in a similar way.
So far, Tom Hiddleston, Daisy Lowe, Stephen Fry, Nigella Lawson, Hugh Grant, Keeley Hawes, Derren Brown and Claudia Winkleman have all posted #wakeupcall selfies.