Angelina Jolie has swapped acting for journalism to urge U.S. President Barack Obama to step up efforts to resolve the Darfur crisis.

The actress has written an article for Newsweek magazine on the plight of refugees in the war-ravaged Sudan region.

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Jolie, who is a Goodwill Ambassador for the United Nations refugee agency, put pen to paper to mark Human Rights Day on Dec. 10 and took the opportunity to address the Obama administration, urging the government to intervene in Darfur.

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She writes, "Like many Americans, I support the administration's willingness to engage diplomatically, even with regimes we abhor. I believe President Obama (and his government) will do their best to bring peace to the region. Their policy, though, raises a number of questions. How is the Obama administration's approach to Sudan an evolution of justice? In addition, when the administration says it intends to work to 'improve the lives of the people of Darfur,' I would like to know what that means, besides the obvious point that their lives could hardly get worse.

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"On this Human Rights Day -- the same day President Obama receives his Nobel Peace Prize -- we must also remember those who have been deprived of their rights. Holding perpetrators of mass atrocities accountable is the best way to ensure justice today and peace in the future. Sudan is the place to start."