Australian Federal Sports Minister Kate Lundy will don a Team GB shirt and show off her rowing skills at the Eton Dorney Olympic venue after losing a bet with her British counterpart.
Ms Lundy lost the bet she made with British Sport and Olympics Minister Hugh Robertson over whose country would amass more Olympic medals.
If Mr Robertson lost he had agreed to wear an Australian shirt and play hockey inside the Australian High Commission in London.
But with Britain third in the medal table with 48 medals and 22 golds and Australia so far bagging a total of 25 medals and 4 golds, Ms Lundy must endure the embarrassment.
"I have cheerfully conceded that I think I will be rowing this time around," she told Britain's ITV's Daybreak.
She described her nation's performance at London 2012 as a "shock".
"I think a lot of Australians are looking at the result and saying 'Where are we?'...But can I say all credit to the British athletes who are having a fantastic Olympic Games."
Asked if it was the best ever Games, Mr Robertson said comparison should not be made, but added: "I think London will reset the dial for Games to come."
Ms Lundy is a keen rower and a patron of the Canberra Rowing Club.
NZN