10. Eric Millegan
Known for his role as Dr. Zack Addy on Bones, Eric Millegan revealed that he has rapid-cycling bipolar disorder in an article on Huffington Post in 2010.
“I was hoping that I could say stuff about mental illness that maybe people didn’t know. You know, speak up for bipolar disorder and let people know a little bit more about it that they may not have known. And hopefully give inspiration, or consolation, or comfort to other people who are bipolar,” he wrote.