Artist Tracey Emin has donated one of her neon works - which can go for five-figure sums - for a raffle to raise money for the Old Vic Theatre.
The artwork, which spells out the words "wanting you" in green and turquoise neon tube lights, could be won in the contest which is being co-ordinated by auction house Christie's.
Emin hopes thousands of pounds will be raised for the theatre, which is aiming to raise £15 million by the end of next year, through the sale of £10 tickets at christies.com/oldvicraffle from today until July 3.
She said: "I'm a massive fan of the Old Vic and have supported them for years but this time it's different.
"By donating Wanting You to be raffled it gives lots more people the opportunity of supporting the Old Vic and also owning my work - I hope that thousands of tickets are sold."
An online auction to raise money for the theatre, featuring works by Jonathan Yeo and Elmgreen & Dragset, will also take place.
Christie's chief executive Steven Murphy said, "Supporting the arts and culture in the communities that Christie's calls home is one of our most enjoyable responsibilities."
The unmade bed was sold to multimillionaire art dealer Charles Saatchi, who is selling it at Christie's in King Street, London, on July 1.
It is being sold with an estimate of £800,000 to £1.2million and all the proceeds from the item will help subsidise free entry at the Saatchi gallery and its free education programme for schools.