Australia prop Ben Alexander can't wait to run out at Twickenham on Saturday, believing the atmosphere is like nowhere else in the world.
The Wallabies are used to playing in front of big crowds, including against New Zealand and South Africa in the recent Rugby Championship.
But Alexander has hailed the unique atmosphere at Twickenham as Ewen McKenzie's squad prepare to take on England at the weekend.
"I've got a British passport, I've got a lot of family from here, I've played over here before," said Alexander.
"It's always a great challenge - the bigger the challenge the more fun it is and it should be a great occasion.
"The whole group's been part of the Rugby Championship so played Test matches in New Zealand and South Africa in front of big crowds.
"At Twickenham, a factor is it's big, they start singing 'Swing low, sweet chariot', everything.
"It's unique, it's amazing and it's good."