Three members of the Investec Super Rugby champion Hurricanes will join the Barbarians to take on South Africa in the Killik Cup match at Wembley Stadium on November 5.
Loose forward Brad Shields, lock Michael Fatialofa and prop Reggie Goodes will don the famous black and white stripes of the Barbarians and will be joined by the Crusaders Richard Mo'unga and Jordan Taufua, as well as Matt Faddes and Luke Whitelock from the Highlanders.
They join New Zealand's Andy Ellis, and Australia's Taquele Naiyaravoro and Will Skelton in the squad being put together by coaches Robbie Deans and Will Greenwood as the famous invitation club targets a hat-trick of wins over the side ranked No.4 in the world.
After taking on South Africa at Wembley, the Barbarians play the Czech Republic in Prague on November 8 before facing Fiji at the Kingspan Stadium in Belfast on November 11.
Deans said: "This is a talented group of young men with the potential to play at the very highest level and they will all be hungry to impress in their time with the Barbarians. Alongside the more experienced players in the squad we should have a very competitive group."
Shields was a rock of the Hurricanes back row this year alongside Victor Vito and Ardie Savea, and Goodes a dynamic and mobile prop, while Fatialofa enjoyed a breakthrough first Super Rugby season with 15 appearances.
Talented young fly half Mo'unga is the successor to Dan Carter at the Crusaders and his teammate Taufua is rated as a back row competitor to the All Blacks' Jerome Kaino.
The Highlanders - Super Rugby champions in 2015 - provide free-scoring centre Faddes and No.8 Whitelock, who was capped by New Zealand in 2013.
The Barbarians take on South Africa for eighth time since 1952 and lead the series 4-3 after victories in 2007 and 2010.
The 125 year-old club won 26-20 in 2010 when tries from Australia's Drew Mitchell (2), James O'Connor and Italy's Quintin Geldenhuys secured victory.
In 2007 the Barbarians were the first side to beat the newly-crowned World Champions with a 22-5 win that saw Australia's Matt Giteau and Rocky Elsom, and Wales's Martyn Williams touch down.