18 May, 11:09
IRFU Chief Executive Philip Browne has issued a statement following confirmation of Ronan O'Gara's decision to retire from playing professional rugby.
He has been chosen to start at half-back against the England-capped Danny Cipriani, with rugby league star Sam Tomkins on the right wing and South African speedster Bryan Habana on the left.
Another Springbok, Victor Matfield, will captain the Baa Baas this weekend. He reprises his role of 2009 when he led them to victory over New Zealand.
Packing down alongside Matfield will be Simon Shaw, 17 years after he was the member of a Barbarian team that beat South Africa.
Graham Henry, who guided New Zealand to Rugby World Cup glory last month, is the coach of a Barbarians combination that features players from 10 different countries and with over a thousand Test caps between them.
Tickets for the Killik Cup match between the Barbarians and Australia are on sale via Ticketmaster.co.uk (0844 847 2492).
BARBARIANS (v Australia): Isaia Toeava (New Zealand); Sam Tomkins (England RL), Robbie Fruean (Crusaders), Stirling Mortlock (Australia), Bryan Habana (South Africa); Danny Cipriani (England), Peter Stringer (Ireland); Eusebio Guinazu (Argentina), Keven Mealamu (New Zealand), Sylvain Marconnet (France), Simon Shaw (England), Victor Matfield (South Africa) (capt), Jerome Kaino (New Zealand), Mauro Bergamasco (Italy), Adam Thomson (New Zealand).
Replacements: Adriaan Strauss (South Africa), Salvatore Perugini (Italy), Jason White (Scotland), Marco Bortolami (Italy), Nemia Kenatale (Fiji), Richard Kahui (New Zealand), Seru Rabeni (Fiji).