George Gregan has been the essence of the Wallabies line-up since his debut in 1994.
Team: ACT Brumbies
Debut: 18/6/94 v Italy
Past World Cups: 1995 and 1999
Did you know? Runs a coffee shop chain in Sydney
And, having just turned 30, he shows no signs of tiring.
The Australian captain will edge ever nearer to 100 Test caps by the end of the tournament, injury permitting.
Along with South Africa's Joost van der Wethuizen, he is still considered the world's best at number nine whether plying his trade as Super 12 skipper or at the helm of the national side.
'Greegs' was born in Zambia, Africa, before moving to Australia with his parents as a young child.
Like England captain Martin Johnson, he has the complete respect and following of his squad.
One of the best passers of the ball with either hand, Gregan is most famous for his ability to find the space for a break at any opportunity. His attacking style will once again be crucial for the Wallabies.