British actress Anna Friel put her fame to good use when she was snapped by paparazzi wearing a sweater emblazoned with the name of an anti-slavery charity.

The Pushing Daisies star stepped out of the Vaudeville Theatre in London on Tuesday (27Nov12) after performing in hit play Uncle Vanya.

She is regularly photographed upon leaving the stage door, and used the opportunity to sport a top with the phrase 'Not For Sale' heavily stitched across her torso, clearly visible beneath her open coat.

The actress is an active supporter of the American charity of the same name, which campaigns to put an end to global human trafficking.

Friel followed in the footsteps of acting couple Andrew Garfield and Emma Stone who earlier this year (12) held up hand made signs promoting charities when they were photographed leaving a restaurant in New York.