Hill has missed the last four World Cup games because of his injury, but he is now fit to pack down alongside his long-time back-row colleagues Neil Back and Lawrence Dallaglio.
The last time Catt played in a World Cup semi-final, he was flattened by New Zealand sensation Jonah Lomu in the opening minutes. The Kiwis won that game 45-29.
If England wins on Sunday, it will face either New Zealand or Australia in the final.