The Duke of Cambridge is expected to preside over his first investiture ceremony at Buckingham Palace this week where he will pin an OBE on Wimbledon champion Andy Murray.
William is expected to create two knights on Thursday and he will award an OBE to Vicar of Dibley producer Jon Plowman.
The 31-year-old reportedly told aides he is "a bit nervous" about the ceremony, which traditionally sees people from across the country honoured.
A royal source told the Press Association: "William has been practising using the sword and pinning the medals on a servant so that he gets it right. He obviously doesn't want to slice anyone's ear off or stick a pin into their chest.
"Above all he realises this is the biggest day in the lives of some people who are being honoured."