Roger Daltrey is done writing his Keith Moon documentary.

The Who lead singer has been working on the film about the late drummer since 2005.

In a new interview, he said, “I’m driven by this project. It came to me in a dream 30 years ago. I just finished a script, and I’m hoping to do my biopic of Keith within the next couple of years. I want people to get an understanding of him and his life, and the complete genius he was. He had so much talent, that boy, but he became out of control for a lot of reasons. Mostly for lack of discipline. But once the drugs kick in, usually that disappears, doesn’t it?”

Daltrey also talked about who might play Moon saying, “There’s an actor who I’ve seen and when I look at him I go, ‘God, it’s Moon.’ I don’t want to jinx it and say his name. He might be too old, but then again, Keith looked 50 when he died. He was 32, but he looked 54.”

Moon died in 1978 from a drug overdose.