We turn to that emotional interview with the mother of "Glee" star Cory monteith who died last year of an overdose. In this ABC news exclusive she has a message for parents and spoke with bianna... See More
We turn to that emotional interview with the mother of "Glee" star Cory monteith who died last year of an overdose. In this ABC news exclusive she has a message for parents and spoke with bianna golodryga about drug abuse. ? Just a small town girl ? Reporter: It's been one year since Cory monteith who shot to fame on the hit series "Glee" lost a lifelong battle with drugs and alcohol at the age of 31. Now Cory's mom, Ann McGregor is speaking out for the first time about the son she called baby bear. How are you feeling right now? The last few days I'm beginning to accept it. The loss is horrendous. Until three days ago I couldn't look at a picture of Cory so there's been progress. Reporter: Can you talk about that night one year ago? No. When you found out? No. ? I know it's late ? and lea, do you keep in touch with lea. I do. She texts me and e-mails me. She's hurting too. Reporter: She last saw Cory two days before his death and said he was planning to sign a lease on a new place in Vancouver. So he wanted to give Hollywood up. He didn't want that life anymore, do you think? I think he was easing himself out of it. Reporter: Cory's mom shared these never before seen videos of Cory as a child. Here at 8 years old in a school play and here a smiling boy giving his dog a bath. Cory had that mischievous side to him all the time. He was always kind of, you know, looking forward -- Something else. Stimulation. When did he start to get into trouble? Cory was 15. He did a code blue and I think that was the turning point. He had a lot of emotional things. He was trying to figure out a lot of it was he really wanted a relationship with his father. I think when a child gets invalidated they keep reaching even higher. They want to find out why. I remember after Cory's first O.D., the drive we took and all he did was stare into his eyes and hug him and look at him because I had this feeling I really want to know him because I'm not going to have him my entire life. That was way back then. And what is your advice to mothers out there of other stars who are facing similar problems. I don't think we have power to change the choices they're making. I think with the kind of connection Cory and I had, if we couldn't prevent that situation, I don't have the answer. What could I say to them? Live every moment. Grab the second. Do you blame Hollywood at all? I don't think blame is a good thing to do, no, he could -- that was his choice. ? Just the same shy does everything ? You have to get some satisfaction when you saw how much talent your son had. Pretty amazing. And he was a star. I'm still in awe. I always will be. And I asked her how she felt the show dealt with his death. She said she hasn't been able to watch it since. In fact, she can't even look at Cory's photos so this was a cathartic moment to finally talk about her son and little things she said we know him as this tall, strapping man he was a peopleny born at 4 pounds. The doctors said if he survives he'll keep on growing. A lot of pain and wisdom. And big message for parents. Coming up, Neil Patrick
This transcript has been automatically generated and may not be 100% accurate.