Keira Knightley leads the searing new trailer for Official Secrets

A new trailer for Official Secrets, the new thriller starring Keira Knightley and Matt Smith, has debuted online. 

Set in 2003 in the lead up to the Iraq war, the movie follows Knightley's Katharine Gun, a GCHQ translator who decides to leaks a classified e-mail that urges spying on members of the UN Security Council to force through the resolution to go to war.

Charged with breaking the Official Secrets Act, and facing imprisonment, Katharine and her lawyers set out to defend her actions...

Matthew Goode, Rhys Ifans, Adam Bakri, Indira Varma, Tamsin Greig and Ralph Fiennes co-star alongside Knightley and Smith.

Gavin Hood, director of Eye In The Sky, is in charge, working from a script from Gregory and Sara Bernstein. 

Official Secrets will be released into UK cinemas on October 18th.