Cindy Crawford says cancer touched her life as a girl.

The supermodel's brother died of leukemia when she was 8 and her grandmother, Ramona Crawford, survived breast cancer."At a very early age, I learned there was cancer treatment and death," Crawford told the New York Times.

Crawford plans to take part today in a charity run in Manhattan to benefit cancer research and has donated money from her swimsuit calendars to the hospital that treated her brother.

"I see science working," she said. "The kind of leukemia he had is now 75 percent curable."