The Glee star Cory Monteith, a child of divorce revealed that he has a drug addiction before. It all started when he was 13. He was cutting classes in school to get drunk and smoke. He got dropped out at the age of 16. He did bad things like burning a lot of bridges and stole money to his relative. His family made him choose whether to get his normal life back or be turned down to a police from that moment he began to realize about his life and started working as a roofer and attended an acting workshop. From that moment his life became more meaningful and happy. BTW, he just graduated high school and got his high school diploma last Spring.