In Belfast, the production spent several months in early 2024 filming at Belfast Harbour Studios and Titanic Studios.
"We also built substantial sets on our back lot," David Cain said.
"Obviously a lot of our work takes place on the mythical island of Berk and its village, so we built a lot of our sets outside for natural light and natural weather."
Audiences in Northern Ireland will quickly recognize the rugged coastline of Dunseverick, where teenagers Hiccup - played by Mason Thames - and Astrid - played by Nico Parker - have a heart-to-heart talk in one of the film's key scenes.
Hiccup befriends the young dragon, Toothless, challenging Viking certainties and the conflict with the dragons.