Hugh Hefner's younger brother, Keith, died at the age of 87 on Friday, ET has confirmed. The Girls Next Door reality star, Playboy exec and occasional actor -- Keith guest-starred on the classic '60s sitcom, Get Smart -- had been battling cancer.
The news comes one day before Hugh's 90th birthday.
Hugh took to Twitter to confirm the news on Friday afternoon, writing, "This morning, my dear brother and best friend passed away. I love you, Keith. Rest in peace."
TMZ first reported the news and say that Keith died at his home in Beverly Hills, California.
Keith's wife, Caya Hefner, has been sharing a number of shots with her husband lately, including a selfie cuddled up together. "You've given me so much love and support!! I'm forever grateful. Love you Keith," she wrote.
You've given me so much love and support!! I'm forever grateful 🙏🏽 love you Keith..