The Duke of Cambridge took part in two mountain rescues in the week after his wedding, the Ministry of Defence has said.
William was on board an RAF Sea King helicopter from RAF Valley in Anglesey which airlifted a 70-year-old walker in Snowdonia to safety.
The crew took the man, who was said to have had a heart attack, to hospital in Bangor before they returned to Snowdon to help four men after one of them suffered vertigo.
Last Friday, the Duke married Kate Middleton, who became the Duchess of Cambridge, at Westminster Abbey, and the couple enjoyed a private weekend before he returned to work.
The crew attended the first site 2,946ft up Lliwedd mountain on Wednesday night.
They returned shortly afterwards to rescue the group, thought to be police officers from the West Midlands and in their 20s, up Crib Goch at 3,560ft.
The men were airlifted from the narrow ridge in an area known as Crib-y-Ddysgyl.
A spokesman from the Ministry of Defence said: "We can confirm that Rescue 122 from RAF Valley conducted two search and rescue operations on May 4.
"The first involved a 70-year-old man with suspected heart problems who was airlifted to safety and taken to hospital.
"The second involved a group of four hill walkers who were overdue. All four were located and airlifted to safety, then discharged to the care of a nearby civilian mountain rescue team."