British newspaper Guardian says Steven Spielberg's DreamWorks Studio has bought screen rights to its book about WikiLeaks and its founder, Julian Assange.

The Guardian says DreamWorks has optioned ``WikiLeaks: Inside Julian Assange's War on Secrecy'' by Guardian journalists David Leigh and Luke Harding, as well as ``Inside WikiLeaks'' by site defector Daniel Domscheit-Berg.

Guardian editor Alan Rusbridger described the proposed film Thursday as ``Woodward and Bernstein meets Stieg Larsson meets Jason Bourne. Plus the odd moment of sheer farce.''

No writer, director or cast have been lined up.

The Guardian worked with WikiLeaks to publish thousands of U.S. military documents and diplomatic cables, but later fell out with the secret-spilling site.