Prince Alwaleed bin Khaled bin Talal bin Abdulaziz Al Saud, known as Saudi Arabia's 'Sleeping Prince', passed away aged 36 after spending nearly 20 years in a coma. Prince Khaled bin Talal bin Abdulaziz, his father, confirmed the news of his death. Prince Alwaleed had been in a coma since 2005, following a car accident while studying in London.