The trained RAF search and rescue captain has saved a 58-year-old Canadian tourist who fell down a crevice.
The Duke of Cambridge who is known as Flight Lieutenant Wales while at work piloted an RAF Sea King rescue helicopter after the woman plunged down a crevice and broke her leg while trekking in Anglesey, the Daily Express reported.
William and his crew were scrambled from RAF Valley and winched her aboard from a sea cliff at Point Lynas.
She was flown to hospital in Bangor.
"The only way to get her out was by RAF helicopter. The winchman had to give her pain relief," coastguard spokesman was quoted by the paper as saying yesterday night.
The rescue came less than a week after William and his crew rescued a 16-year-old girl when she got into difficulties in the sea off Anglesey.