One Direction are taking over the airwaves on Youth Station Radio 1 on Saturday October 6.
It's all in aid of that Radio 1 Teen Awards stuff, with a different 'lad' joining a Radio 1 DJ for two hours from 8am to 6pm.
According to BBC Newsbeat, Liam will be co-hosting with Gemma Cairney, Zayn with Scott Mills, frontman Niall with Huw Stephens, Louis with Greg James and Harry with your friend and ours Nick Grimshaw (obviously).