Ai Weiwei and Anish Kapoor will join forces for a 7 mile walk through London to mark the refugee crisis.
The two artists will each carry a single blanket as a symbol of the needs that faces 60 million refugees across the world.
The walk across the capital will take place on Thursday 17 September, stretching from the Royal Academy of Arts - where an Ai Weiwei retrospective has just opened - to Stratford.
The artists have said they welcome participation from members of the public. The walk will begin at 10am from the Royal Academy on the Mall in Picadilly.