Last updated at 15:11 13 March 2008

Scarlett Johansson's offer of a dream date with her has fetched nearly £20,000 at auction.

The chance to spend a night with the 23-year-old Hollywood beauty sparked a bidding frenzy among eager suitors on eBay.

Bidding began at just 50p but soared upwards with 170 offers made in all.

The highest bid was £19,680 and the lucky winner, who is from the UK, will now join the sexy blonde at the premiere of her film He's Just Not That Into You in Los Angeles or New York next July.

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He will be ferried to the glittering event in a chauffeur-driven limousine and will join the star on the red carpet.

He can take a friend along - but might prefer to keep Scarlett all to himself.

After the screening, Bafta winner Scarlett will hand her date a personal handwritten note.

But he may have his work cut out wooing her as she is rumoured to be about to marry actor Ryan Reynolds, 31.

All proceeds from the auction are going to Oxfam.

Scarlett has been involved with the charity since 2005 and travelled to Sri Lanka and India last year to meet families affected by the Tsunami.

Her latest role sees her playing the mistress of Henry VIII alongside Eric Bana in The Other Boleyn Girl.