You see, although the coffee is technically free the event is in partnership with UNICEF UK, the children’s charity devoted to helping children in danger around the world.

All those who attend and swipe a caffeine hit from the hands of these big names will be encouraged to donate something to the charity, and do their bit in helping young people living without food, water or safety.

It’s not exactly clear how long Haddish and Pratt will be sticking around so we suggest getting down there earlier rather than later, because as we say, it’s not everyday that you get the chance to have a chat with Hollywood heavyweights while enjoying your morning brew. And what a good story to tell your colleagues when you make it to your desk, eh?

Check out the The Coffee Chain on February 1 and 2 from 10-6 and 10-5 at Observation Point, South Bank, 58–72 Upper Ground, London, SE1 9LT.

Images: Getty

Here’s how to catch Tiffany Haddish serving up coffee at London’s South Bank