But on set, something went horribly wrong.
Now, Radcliffe is exec producing a documentary about his former stunt double and friend, following an accident on the set of Deathly Hallows: Part 1, called David Holmes: The Boy Who Lived.
The accident on the Harry Potter set.
When Holmes was 27, and rehearsing a scene for the Deathly Hallows, a film set explosion occurred.
Holmes was flying in the air when he was thrown into a wall and pulled back by a high-strength wire, breaking his neck. According to an article in The Mirror at the time, Holmes laid on the ground, conscious, before telling his colleagues, "I can't feel my legs".