Getty Sharon Stone is sharing the devastating news of the loss of her brother, Mike Stone. The 68-year-old Basic Instinct actress revealed that her brother passed away at the age of 74 on her social media on Wednesday (May 13). "Mike Stone, My oldest brother, Has passed away. Following an extended illness. We wish him peace. Sharon, Roan, Laird & Quinn," she captioned a photo of her late brother. "Sorry for your loss Sharon," wrote Darren Le Gallo. D-Nice added: "Sending you love. My deepest condolences to your family." Debi Mazar said: "My condolences Sharon.