Halle Berry is using fashion to fight for a great cause.

The actress is teaming up with Saks Fifth Avenue, Stand Up to Cancer and the Entertainment Industry Foundation for the Key to the Cure campaign.

Signing on as the official ambassador for the cause, Berry will be rocking an exclusive limited-edition t-shirt designed by Christian Louboutin in the campaign images.

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“I, like so many others, have been touched by cancer, which is why I’m proud to continue to lend my support to the Entertainment Industry Foundation and Stand Up to Cancer in serving as this year’s Key to the Cure ambassador,” Berry, 49, said in a statement. “I hope everyone will join me in supporting this critical cause by purchasing a Key to the Cure T-shirt.”

Since the program’s inception 18 years ago, it has been able to raise “close to $40 million for cancer research and treatment organizations throughout the United States,” president of Saks Fifth Avenue Marc Metrick said.

All profits from the sale of the t-shirt will be donated to Stand Up to Cancer.

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