Rihanna is in London doing some promotion for her big screen acting debut 'Battleship'.

The singer joined her co-stars Brooklyn Decker and Taylor Kitsch at the photocall held at The Corinthia Hotel this afternoon and for the occasion she chose an olive-green Alexander Wang dress from the Pre-Fall 2012 collection.

Her satin halter dress with a gathered detail across the skirt was teamed with simple black Christian Louboutin pumps and gold jewelry.

She wore her hair in large, loose waves while her make-up was kept simple and natural.

I adore the fit of this dress and I think Rihanna looks great.

source: zimbio