Keith Hefner, the younger brother of Playboy founder Hugh Hefner, has reportedly died at the age of 87.

According to TMZ, he passed away at his home in Beverly Hills after a battle with cancer, though it's unclear at this time what caused his death.

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Keith was a longtime exec at his brother's company, handling Playboy Bunny training and recruitment. He also tried his hand at acting, appearing in the classic sitcom, Get Smart. He is survived by wife Caya Hefner.

Our thoughts are with his family during this difficult time.