England are favourites to win the five-match series but Haddin believes that his teammates will rise to the occasion when the first Test begins at Trent Bridge on Wednesday.
The 35-year-old told reporters: "I think it is important to live in the moment - new dreams are made and new experiences are about to happen.
"We can't wait for it to happen the Ashes is a fantastic series. You have to win the big moments and recognise those big moments before they happen.
"We have some exciting players and we will be judged after the fifth Test. We know the talent we have in our changing room and it will be exciting to see them unleashed."
Haddin has played 44 times for Australia at Test level.