More than 100 children and teenagers will sing in a unique performance at the One Young World Summit in Dublin.
The children from five primary schools and one secondary school in Ballymun, Dublin will sing with Cor na nOg at the opening of the five-day international event at the National Convention Centre on Wednesday.
The young singers had a final rehearsal at the RTE Radio Centre on Saturday.
They will sing Ballymun Lullaby and The World Is Your Oyster in front of 1,200 young delegates from around the world.
Ron Cooney, musical director of the DIT Ballymun Music Programme, said conductor David Brophy and the children have been working hard in preparation for the performance of the works composed by Daragh O'Toole.
The One Young World Summit will host delegates from more than 190 countries and will take place at venues across Dublin.
The summit's aim is to create positive and lasting change in areas including youth unemployment, education, sustainable development, leadership and government.
The first summit took place in London in 2010, and since then it has visited Zurich, Pittsburgh and Johannesburg.
Richard Branson, Kofi An- nan, Arianna Huffington, Bill Clinton and Archbishop Desmond Tutu have all spoken at the summits.
Delegates debate, formulate and share innovative solutions for the pressing issues the world faces.
After each summit, the delegates work on their own initiatives or support the One Young World network.
Independent News and Media, the publishers of this paper, are official media partners at the event.