Tolle is a spiritual public speaker and author, probably best known for his self-help book The Power Of Now. The slim Milton's Secret, published in 2009, was an attempt to translate his 'live in the moment' philosophy for a younger readership. The Milton of the title is the story's young protagonist, who learns to overcome his fear of bullies and other childhood nightmares by living in the moment, and ceasing to "project his past fears into the future".
Sutherland will play Milton's grandfather – a role previously occupied by Peter Fonda (3:10 To Yuma), who has had to drop out. There is no other cast announced yet, but pre-production is already underway, for a shoot in Ontario in the autumn. The book itself is published by Hampton Roads.