The annual Isle of Man TT race usually has its fair share of high-profile visitors, but few come more esteemed than the Duke of Cambridge.
In his first official visit to the island, Prince William met members of the public and posed for photos on a super-bike.
The prince has a well-publicised love of motorcycles, but his wife, the Duchess of Cambridge, is less keen on the machines - especially when her husband is riding one.
Responding to questions about his wife's feelings on motorcycles, the duke said, "When I said I was going to the Isle of Man for an official visit she said 'really?'."
William watched riders hitting nearly 200mph, as well as meeting with spectators and TT organisers.
He also started the TT Zero race for electric motorcycles.
His itinerary also included dropping into the offices of the Joey Dunlop Foundation, which provides specialist accommodation for TT visitors who have disabilities.
One of the foundation's workers, Gilly Keown, said: "When we heard about Prince William's visit we were thrilled that he has chosen to spend part of his time here with the foundation.
"We are looking forward to meeting him along with our residents. We hope he enjoys his time here."
He also met the Isle of Man's chief minister, Howard Quayle.
The Isle of Man TT remains one of the most prestigious - and longest running - motorsports events in the world.
While the race is well-loved for its high-octane action, the riders take significant risks when they take to the track. Two riders have died at this year's event.