British band The Pet Shop Boys are set to headline Moscow's Live 8 concert in Red Square on 2 July.
Moscow is the final of the G8 nations to announce a Live 8 show
It takes the total number of concerts on 2 July across the globe to 10, one in each of the G8 nations, one in South Africa and a smaller gig in Cornwall.
The concerts, aimed at raising awareness of global poverty, have been timed to coincide with the G8 summit of world leaders in Scotland on 6 July.
A further concert will take place on 6 July in Edinburgh as the summit begins.
"It is terribly important that we represent each of the G8 nations," said film-maker and Live 8 campaigner Richard Curtis prior to confirmation of the Moscow concert last week.
Saturday's concerts will kick off in Tokyo in the east and end in Philadelphia and near Toronto in the west, taking in Johannesburg, Paris, Berlin, Rome, London and Moscow on the way.
Top Russian bands including Bravo, B-2 and Spleen will perform alongside the Pet Shop Boys in the Russian capital from 1900 local time (1600 BST).
Meanwhile, fans of Sir Elton John will be able to see coverage of Live 8 at his Dublin show on Saturday as two giant screens will be erected at the venue.
Gates to the Royal Dublin Showground will open early at 1300 BST to allow fans to watch footage from the Live 8 concert in London's Hyde Park, where Sir Elton will play before jetting to Ireland.