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SCARLETT JOHANSSON has put herself on the auction block for a very worthy cause. Starting today, fans of 'The Other Boleyn Girl' star can go to eBay and bid on one of her upcoming premieres, with all proceeds raised going toward Oxfam, an international development and relief agency.

The winner will receive two tickets to the world premiere of Scarlett's new movie 'He's Just Not That Into You' in July, a chauffeured car to the event and a meet and greet with the actress herself.

According to US Weekly, other celebrities are also auctioning items on behalf of Oxfam. KRISTEN DAVIS has put up two tickets to the June 'Sex and the City' movie premiere in New York along with a pair of JIMMY CHOO shoes; and COLIN FIRTH not only served up two tickets to the July premiere and after party of 'Mamma Mia' in London, he also threw a personalized birthday video greeting in as well. Colin's auction ended Sunday with the winner forking over more than $8,000.