Harry Potter star Matthew Lewis took time out from his visit to the Royal International Air Tattoo to join celebrations marking the 75th anniversary of the Air Cadets.
The Air Tattoo, the world's largest military air show, regularly attracts celebrities among its large crowds.
Matthew played the bumbling Gryffindor student Neville Longbottom in all eight films, alongside Daniel Radcliffe, Rupert Grint and Emma Watson.
Arriving at RAF Fairford in Gloucestershire for the first public day of the airshow, the former cadet joined a group of young air cadets to cut a cake in celebration of the organisation's anniversary.
As a youngster, Matthew was a keen cadet with the 2168 (Yeadon) Squadron, but filming commitments took priority.
In addition to speaking with the cadets about their experience, the airshow and, of course, Harry Potter, the actor cut a specially made cake.
Matthew said attending the Air Tattoo is a privilege: "This year, being the Air Cadets 75th anniversary, it has been extra special for me having been an air cadet many years ago.
"Being asked to cut the celebratory cake in front of so many cadets and visitors has been a big deal for me and I have been thrilled to be asked to do it."
The Air Tattoo is staged annually in support of the RAF Charitable Trust, which aims to support the RAF and encourage interest in the aviation industry among young people.
Matthew became so identified with his pudgy, bad-toothed character that his transformation into handsome adult actor has spawned the verb "to Neville Longbottom" - when a character grows up into an attractive adult.
He recently starred in Me Before You, an adaptation of the JoJo Moyes novel, with Hunger Games' Sam Claflin and Game Of Thrones' Emilia Clarke playing a paralysed young man and his carer.