Munster and Ireland lock Donncha O'Callaghan has been handed a starting berth for his debut match for the Barbarians against an England XV at Twickenham on Sunday (kick-off 3pm, live Sky Sports 1).
Argentina's Juan Manuel Leguizamon will captain a Barbarians side brimming with household names against hosts England this weekend.
The Lyon flanker leads a matchday squad drawn from nine different nations with more than 700 international caps between them.
Munster lock Donncha O'Callaghan - making his first appearance in the black and white jersey - heads the squad cap count with 94 for Ireland and four Test appearances for the British & Irish Lions.
Ulster's Roger Wilson is also poised to make his Barbarians debut having been named among the replacements.
Head coach Dean Ryan has named a physical forward pack featuring powerful Georgia number 8 Mamuka Gorgodze, and an exciting backs division that includes New Zealand wings Joe Rokocoko (Bayonne) and Hosea Gear (Toulouse). Clermont Auvergne out-half Brock James is the only uncapped player in the line-up.
"Juan Manuel Leguizamon commands respect as a player, he's led the Pumas in Tests and he'll do an excellent job throughout this week and at Twickenham on Sunday," said Ryan.
"It's a privilege to work with such an experienced and talented group, and in the short time we've been together they've shown how committed they are to delivering a first-class performance.
"The Barbarians is a special entity in the way it brings together outstanding players from all corners of the rugby world but ultimately we have to deliver on the pitch and that is our aim."
There are two late changes to the squad with tighthead prop Davit Kubriashvili (Stade Francais) coming in for injured fellow Georgian Davit Zirakashvili (Clermont), while All Black Anthony Tuitavake (Montpellier) replaces Australia's James O'Connor (London Irish).
Tickets to England XV v Barbarians, priced from £25 for adults (£10 juniors), are available from Ticketmaster on 0844 847 2492 or from the RFU ticketing site.
BARBARIANS (v England XV): Juan Martin Hernandez (Racing Metro 92/Argentina); Joe Rokocoko (Bayonne/New Zealand), Rene Ranger (Montpellier/New Zealand), Benson Stanley (Clermont Auvergne/New Zealand), Hosea Gear (Toulouse/New Zealand); Brock James (Clermont Auvergne), Jimmy Cowan (Gloucester/New Zealand); Sona Taumalolo (Perpignan/Tonga), Ti'i Paulo (Clermont Auvergne/Samoa), Davit Kubriashvili (Stade Francais/Georgia), Donncha O'Callaghan (Munster/Ireland), Juandre Kruger (Racing Metro 92/South Africa), Juan Manuel Leguizamon (Lyon/Argentina) (capt), Alexandre Lapandry (Clermont Auvergne/France), Mamuka Gorgodze (Montpellier/Georgia).
Replacements: Andrew Hore (Maniototo/New Zealand), Julien Brugnaut (Racing Metro 92/France), Nahuel Lobo (Montpellier/Argentina), Joe Tekori (Toulouse/Samoa), Roger Wilson (Ulster/Ireland), Tomas Cubelli (Belgrano/Argentina), Francois Trinh-Duc (Montpellier/France), Anthony Tuitavake (Montpellier/New Zealand).
We hear from BBC commentator Jim Neilly, Ulster Rugby CEO Shane Logan and Ulster and Ireland's Jared Payne as a 5,000-strong crowd came along to the Ireland open session at Kingspan Stadium in Belfast.
IRFU Chief Executive Philip Browne and Ireland Women's out-half and IRFU Women's & Girls Rugby Development Executive Nora Stapleton talk about the Irish bid to host the next Women's Rugby World Cup in 2017.
Looking forward to facing England on Sunday, Ireland winger Tommy Bowe said: "We've trained very well this week, we're really excited about the game. It's about going out there and doing whatever we can to get ourselves that win."
Second row Devin Toner previews Ireland's crunch RBS 6 Nations clash with England, saying: "It's a pretty formidable English pack. Attwood and Kruis have played fantastically well. They're well drilled and focused and their scrum and lineout are very good."
Looking forward to facing England this weekend, Ireland back rower Sean O'Brien said: "It's obviously exciting, but it's one game at a time. I don't think there's any more pressure on us than in the first two games. That's the way you have to look at it."
Irish Rugby TV sat down with Ireland Under-20 scrum coach John Fogarty to talk about the U-20 Six Nations so far and Friday's clash with England at Donnybrook. Tickets are on sale on www.ticketmaster.ie.
Ireland Under-20 captain Nick McCarthy and fellow back Billy Dardis spoke to Irish Rugby TV about Friday's U-20 Six Nations showdown with England at Donnybrook. Tickets available on www.ticketmaster.ie.
Shane Byrne and Malcolm O'Kelly preview the Ireland v England Legends match which takes place at Donnybrook this coming Saturday (kick-off 7.30pm). Tickets are available from www.ticketmaster.ie. All proceeds from the game will go to support the IRFU Charitable Trust and the RFU All Schools Charity.