11. Emilia Clarke
During the shooting of Game of Thrones Season 3, Emilia Clarke was hospitalized. She was taken for a condition called brain aneurysm, where the artery supplying blood to the brain swells up. This can be fatal and can result in a hemorrhage in case the artery blows up and causes blood leakage in the brain. And the most horrifying thing about this condition is that the symptoms do not show up until its too late! But praise to the lord and salute to her motivation. Our beloved Danaerys Targaryan joined the season 4 as soon as her treatment ended.