Omar Sharif, the Egyptian-born actor known for his classic roles in Lawrence of Arabia and Dr. Zhivago, passed away Friday at the age of 83 in a Cairo, Egypt hospital after suffering a heart attack. Both the actor's agent Steve Kenis and the head of Egypt's Theatrical Arts Guild Ashraf Zaki confirmed his passing. Variety reports that it was recently revealed that the Golden Globe-winning actor was also suffering from Alzheimer's disease. After beginning his career as a major star in Middle Eastern cinema, Sharif was cast to play Sherif Ali in 1962's epic Lawrence of Arabia, the actor's first English-language role. Sharif was nominated for a Best Supporting Actor Academy Award for his performance and won the Golden Globe in that same category for his breakthrough role.