DiCaprio leads a star-studded cast for World Economic Forum in Davos

Other attendees will include John Kerry, Justin Trudeau, Will.i.am and Loretta Lynch, as well as the archbishop of Canterbury and representatives from Uber

A cast of politicians, digital pioneers, activists and Hollywood glitterati will gather in the Swiss ski resort of Davos next week for the annual World Economic Forum, which will take place against mounting fears of a new global crash.

While the official theme of the five-day annual event is "the fourth industrial revolution" - a topic that will focus on the looming impact of robots and artificial intelligence - the real talking point for the 2,500 participants will be whether the violent gyrations in global financial markets since the turn of the year are evidence of trouble to come.