Prince to open palaces as celebrities

Visitors will be able to stroll amongst the manicured lawns and tree-covered open spaces of Charles's London residence and the neighbouring grounds of Lancaster House and Marlborough House for the 12-day Garden Party To Make A Difference.

The event is part of the Prince's Start initiative which aims to help people across the UK lead a more sustainable lifestyle.

Charles, whose own vegetable patch and rose garden will be open to the public, said: "This festival is just one way in which Start can help to demonstrate how we can all make a difference, however big or small the steps we take."

A host of famous faces from the worlds of entertainment and business have backed the initiative, with support or practical help.

Jools Holland has created the musical programme while debate will be handled by Jonathan Dimbleby, Sanjeev Bhaskar and Clive Anderson.

The fashion element will be provided by Dame Vivienne Westwood and Yorkshire's Alan Titchmarsh will cover growing and gardens.

The garden party festival is due to run from September 8 to 19.