The Prince's Rainforests Project

In a 90-second film, which was launched on MySpace the social networking site, the young Princes sat side by side at Highgrove and pledged that they were "trying to save the environment for all of us".

The brothers recruited Daniel Craig, when they met him at the premiere of the latest James Bond film last year, to appear in the film alongside Robin Williams, the Hollywood actor, who agreed at the 60th birthday concert for the Prince of Wales last year.

But the biggest star of the film was a digitally created frog who appeared alongside all three Princes and the other cast members including Harrison Ford and the Dalai Lama who introduced himself as a "simple Buddhist monk".

The film launched an online campaign by the Prince's Rainforests Project to sign up people across the globe to demand an end to tropical deforestation. In the film the Prince of Wales said: "Princes and frogs have a long association but our frog is symbolic with the world's rainforests. The frog is a symbol of action against climate change."

The frog was created by Framestore, the Oscar winning computer generated imagery company behind the film The Golden Compass which was based on the first book in the Philip Pullman Northern Lights trilogy.

Another Amphibian star featured in the video if The Muppets Legend Kermit The Frog Who also talks of saving his homeland.

The Prince said: "Our aim, with your help, is to build an online community to call, from the bottom up, for urgent action to protect the rainforests, without which we will most certainly lose the battle against catastrophic climate change."

Harrison Ford, best-known for his roles in Indiana Jones and ]]Star Wars]], has campaigned for the environment for several years. He said: "What happens in the rainforest has an immediate and powerful effect on our lives. I believe it is our moral responsibility to protect the environment, to save what we can of the planet's resources for future generations and our children."

The film was described by Paddy Harverson, the Prince's communications secretary, " as "unprecedented" " move by the future King to raise the profile of his climate change campaign. Asked if it had now become his most important issue, Mr` Harverson said: "Yes. He has been passionate about protecting the environment from the very beginning of his public life. It is unique in terms of demonstrating his commitment."