Photocall: 'G.I. JOE...'

British actress Sienna Miller poses with Royal Marines onboarding the HMS Belfast to promote launch of the film 'G.I. JOE: The Rise of Cobra', in London, Wednesday July 22, 2009.  (AP/Joel Ryan)

British actress Sienna Miller poses with wet trousers from her water bound arrival, during a photocall for her new film 'G.I. JOE: The Rise of Cobra', on the HMS Belfast in central London on July 22, 2009. (AFP/Shaun Curry)

British actress Sienna Miller (C) poses with the Royal Marine Commandos during a photocall for her new film 'G.I. JOE: The Rise of Cobra', on the HMS Belfast in central London on July 22, 2009. (AFP/Shaun Curry)

British actress Sienna Miller (C) poses with US actor Channing Tatum (L) and Director Stephen Sommers, during a photocall for her new film 'G.I. JOE: The Rise of Cobra', on the HMS Belfast in central London on July 22, 2009. (AFP)

British actress Sienna Miller (R) poses with US actor Channing Tatum, during a photocall for her new film 'G.I. JOE: The Rise of Cobra', on the HMS Belfast in central London on July 22, 2009. (AFP)

British actress Sienna Miller, and US actor Channing Tatum, right, pose for photographers to promote launch of the film 'G.I. JOE: The Rise of Cobra', in London, Wednesday July 22, 2009.  (AP/Joel Ryan)

British actress Sienna Miller poses onboard the HMS Belfast to promote launch of the film 'G.I. JOE: The Rise of Cobra', in London, Wednesday July 22, 2009.  (AP/Joel Ryan)

British actress Sienna Miller poses with Czech actress Karolina Kurkova, left, and U.S. actress Rachel Nichols, right, onboard the HMS Belfast to launch the release of the film 'G.I. JOE: The Rise of Cobra', in London, Wednesday July 22, 2009. (AP/Joel Ryan)

The cast of 'G.I. Joe', from left, U.S. actors Dennis Quaid, Channing Tatum, Czech actress Karolina Kurkova, British actress Sienna Miller, U.S actors Rachel Nichols, and Marlon Wayans and British actor Adewale Akinnuoye-Agbaje, onboard the HMS Belfast to launch the film 'G.I. JOE: The Rise of Cobra', in London, Wednesday July 22, 2009. (AP/Joel Ryan)

The cast of 'G.I Joe', from left, U.S. actor Channing Tatum, Czech actress Karolina Kurkova, British actress Sienna Miller hugging U.S director Stephen Sommers, U.S actors Rachel Nichols and Marlon Wayans, onboard the HMS Belfast to launch the release of the film 'G.I. JOE: The Rise of Cobra', in London, Wednesday July 22, 2009. (AP/Joel Ryan)