Prince William congratulated the latest intake of police recruits during a passing out parade at the Metropolitan force's training college in Hendon, north London.
The second in line to the throne admitted that inspecting the police recruits' passing out parade sent his "knees knocking", with the memory of his graduation from army training at Sandhurst still fresh.
Despite Prince William admitting to nerves, many of those on parade were able to enjoy a laugh as they launched into a Mexican wave.
William appeared to bear no grudges with police horse Kensington, despite the animal sneezing on his sleeve as the prince inspected him.
Metropolitan Police Commissioner Sir Paul Stephenson joked that the cash-strapped force would not be able to pay Prince William's dry cleaning bill.
The prince said police recruits at Hendon had done themselves - and their instructors - proud with their "immaculate smartness" and wished them the best of luck in their careers.