HOK Sports has been handed the job of designing the new Lansdowne Road Stadium in Dublin - one of the world's most famous stadiums.
The London-based practice saw off 'substantial international interest' to rethink the home of Irish rugby union and football.
The firm will now lead a design team that includes local architect Scott Tallon Walker and engineer Buro Happold.
Ireland's minister for arts, sport and tourism, John O'Donoghue, said: 'We now have a team that can deliver a worldclass facility that will be a vital support for sport at a national and international level, and also respond constructively to the concerns of the local community.' The minister also confirmed that the government would provide ?191 million (£130 million) towards the project, which it is estimated will cost ?292 million (£199 million).
A full planning application for the scheme is expected to be submitted in December.