Survivalist Bear Grylls and comedian David Walliams were greeted by 1,500 excited scouts on Saturday morning when they flew in to the Kernow International Jamboree near Bodmin.
Chief Scout Grylls arrived with the Britain's Got Talent judge by helicopter at the Pencarrow Estate on the first leg of four visits to scout camps across the country on Saturday.
The Scout Association boasts a growing waiting list of 38,000 nationally, with around 500 of those from Cornwall, however is unable to expand because of a lack of adult volunteers.
The stop formed part of a UK tour by Grylls to expand the adult membership, and he was keen to enlist the support of Walliams by, he said, showing him all the "amazing things that scouts get to do".
He said: "It's so important that more adults sign up to volunteer with us to allow even more young people to sign up too – as Chief Scout I want to make sure that everyone has the opportunity to get involved. Scouting gets adults and young people outdoors and active. It boosts your confidence and teaches life skills that are hard to find elsewhere. That's why scouting is more popular than ever. It's so important that more adults sign up to volunteer with us to allow even more young people to sign up too."
Debby Davison, a scout leader from Boscastle, said it was great to see Grylls calling on more adults to join the movement. She said: "It's such a brilliant thing to do, and it's especially rewarding on a day like today. I've picked up lots of new skills as a new scout volunteer, and it's so easy to fit scouting around my daily life."