The life of All Black legend Jonah Lomu is set to be told in the two-part mini-series Jonah, The Untold Story.

The legendary All Black died on November 18, 2015 of a heart attack following a long battle with kidney failure.

Not only did he leave behind a wife, Nadene, and two sons, but a legion of fans around the world.

New Zealand is a country blessed with many sporting legends, but Lomu stood above them all.

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Jonah, The Untold Story will explore the phenomenal tale of the boy from Tonga who took New Zealand and the rugby world by storm.

Jonah's wife Nadene said it's been a "heart-breaking and emotional journey" making the show.

"I appreciate the efforts of all involved in bringing Jonah's story to live," she said.

MediaWorks Chief Content Officer Andrew Szusterman said it's an honour to tell Jonah's story.

"What Ali was to boxing, Lomu is to rugby. There has never been and most likely never will be a bigger name in our national game."

Made in collaboration with Great Southern Television, CEO Philip Smith they are the first biographers to talk to everyone.

"You'll get the real story. Not the cliches. It will be confronting but an incredible ride at the same time, just like his life," Smith said.

The mini-series has been given the green light in the latest round of New Zealand On Air funding and will air on Three next year.