They are one of the most famous street artists of all time, and their artwork has cropped up in unlikely places and occasionally sold for millions over the years.

The true identity of Banksy, however, has never been known - until now.

Back in 2003, the then up-and-coming street artist conducted an interview with the BBC's arts correspondent Nigel Wrench, which was used in a radio interview at the time.

The footage was used in a BBC podcast series called 'The Banksy Story' that was released in July of this year - but when Wrench heard it, he was inspired to go back and unearth the full unedited conversation, which turned up some very interesting information.

When Wrench, who was interviewing the artist ahead of an art show in London, asks him if his name is Robert Banks, he replies: 'It's Robbie.'

Little has been known about Banksy in the past, with rumours circulating that he is both Robert Del Naja of Massive Attack, or Jamie Hewlett of Gorillaz. In 2008, another newspaper claimed to have unmasked him as a Bristol-based man called Robin Gunningham, who went by the name Robin Banks - and spoke to Gunningham's old schoolfriends to corroborate their story.

An interview The Guardian conducted with him the same year described him as "white, 28, scruffy casual – jeans, T-shirt, a silver tooth, silver chain and silver earring. He looks like a cross between Jimmy Nail and Mike Skinner of the Streets."

A court case regarding an alleged defamatory post made by the artist may force him to reveal his true identity once and for all. In any case, it seems that he confirmed his name twenty years ago as Robbie - although we may never know for sure.