Springbok forwards Tendai Mtawarira and Eben Etzebeth will feature for the Barbarians against Fiji at Twickenham on 30 November 2013.
The Springbok duo were among six international stars confirmed to represent the famous club along with All Black quartet Steven Luatua, Tom Taylor, Charles Piutau and Frank Halai.
The Barbarians broke the news via a series of tweets on Wednesday.
Springbok captain Jean de Villiers and loose forward Schalk Burger will also don the black and white hoops in a team that will be coached by All Black mentor Steve Hansen.