England are accustomed to taking on Southern Hemisphere opposition at this level having defeated South Africa in the semi final in the past two Junior World Cups.
Australia will be a tough challenge. They topped their pool with three wins from three having defeated South Africa, Scotland and Tonga.
One possible advantage for England is that they have been based in Rosario for their pool games whereas Australia will have to travel having played their pool matches in Santa Fe.
The Gloucester trio of Freddie Burns, Shaun Knight and Jonny May have all played a significant part in England's progress so far.
Burns started the first game against Argentina at fly half before moving back to full back before scoring two tries as a replacement in the second game against Ireland. He kicked three penalties from full back against France.
Jonny May caught the eye with a hat trick in England's opener against Argentina before featuring in the next two matches as a replacement. Jonny has looked dangerous whenever on the field and will be pushing to be involved in the semi final.
Finally, Shaun Knight has started two of the three pool matches at tight head prop with the England pack as a whole looking a strong unit at this level.
Coverage of the two semi finals is on Sky Sports 3 and Sky Sports 3 HD from 6pm onwards on Thursday.