Footballer David James and actress Jane Seymour were among the celebs who helped re-create a giant rendition of Constable's The Hay Wain Photo: © Rex

TV presenter Rolf Harris went back to his artistic roots to lead a star-studded "draw-in" with the help of famous faces such as Changing Rooms guru Linda Barker, footballer David James and ex-Bond girl Jane Seymour.

The popular British celebs joined nearly 150 participants of all ages, skill levels and walks of life, who gathered in Trafalgar Square to create a giant replica – measuring about the size of a double decker bus – of John Contstable's famous work, The Hay Wain.

Once finished, the 144 individual canvases were aligned to form the enormous rendition of the famous Suffolk country scene, which was then unveiled outside the National Gallery on Sunday evening.

Describing the endeavour as "one of the most ambitious paintings I have ever attempted in my career", Animal Hospital host Rolf was thrilled to promote the joys of art. "Art is something for everyone to enjoy in one way or another," said the Australian-born entertainer, who initially came to London to study art in 1952.

The Trafalgar Square event was held as part of the Art On The Square project, organised by the BBC, National Gallery, National Portrait Gallery, London Mayor Ken Livingstone and the Campaign for Drawing's nationwide festival, The Big Draw.