The surprise mastermind behind the Thor: Ragnarok trailer's best line

The surprise mastermind behind the Thor: Ragnarok trailer's best line

You must've been living under a rock if you missed the Thor: Ragnarok teaser trailer back in April.

It shattered records as the most-watched Marvel or Disney trailer ever, became the third most-watched trailer of all time - and it's directed by Aotearoa's very own Taika Waititi.

The clip, which was watched by 139 million people in its first 24 hours, drew widespread acclaim for its irreverent humour and its vastly different style in comparison to previous Thor films.

The standout moment comes as Thor prepares to face off against another fighter in some sort of intergalactic gladiatorial arena, only to realise his opponent is a friend: the Incredible Hulk.

Turning to the bloodthirsty crowd, he yells "We know each other! He's a friend from work!"

That line on its own drew plenty of praise - but as Entertainment Weekly reporter Julia Cunningham found out, the mastermind that thought it up wasn't anyone who would've been expected.

Putting it to Chris Hemsworth, Cunningham asked if it was him that came up with the joke - but his response was a genuine surprise.

"We had a young kid, a Make-A-Wish kid on set that day," the Australian actor explained.

"In between the takes I was talking to him - we had a bit of back and forth - and he said 'You know, you should say he's a friend from work!'

"That's from a young man I keep in contact with," he said, to astonishment from co-star Mark Ruffalo.

Later in the interview, Waititi admitted "about 95 percent" of the film's script was improvised, with the Kiwi director saying it was a process of "me yelling words at [Hemsworth], and him yelling some back".

Thor: Ragnarok is set for an October release.

Newshub.