A trailer for the documentary about the inspirational journey of former Christchurch Boys' High School head boy Jake Bailey has been released.

Bailey captured global attention after his heart-wrenching head boy speech to his peers days after being diagnosed with aggressive, rare cancer Burkitt non-Hodgkin's lymphoma and being told he had three weeks to live without treatment.

Bailey spoke to Tim Dower this morning about the upcoming documentary.

Watch the trailer for the documentary below: