Sienna Miller has landed a lucrative deal with jewellery and pen firm Mont Blanc.
The actress will pose wearing the expensive jewels, as part of a campaign for one of her favourite charities, UNICEF.
She and 11 other celebrities, including Hollywood starlets Eva Longoria and Hilary Swank will also be included in the campaign to raise money for a child reading project, reports The Sunday Mirror.
Sienna's agent has not yet commented on how much she is being paid to appear in the campaign, but has said she'll soon be appearing in her Broadway debut, starring in the play After Miss Julie.
Despite Katherine Jenkins being the brand's ambassador for the past three years, she has reportedly not been included in the new charity line-up.
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