June 15 (UPI) -- The Boys star Erin Moriarty has announced on Instagram she is suffering from Graves' disease. "Autoimmune disease manifests differently in everybody/every body. Your experience will be different from mine," Moriarty, 30, posted this weekend.

"Within 24 hours of beginning treatment, I felt the light coming back on. It's been increasing in strength ever since." View Entire Post ›

"If I hadn't chalked it all up to stress and fatigue, I would've caught this sooner," the actress said of the autoimmune condition, which causes the overproduction of thyroid hormone.