Julian Dennison talks Deadpool 2 at Thor: Ragnarok NZ premiere

Julian Dennison has given a little insight into what it was like filming Deadpool 2 with Ryan Reynolds while ensuring he kept all plot details of the film firmly under wraps.

The Hunt for the Wilderpeople star made the comments at the New Zealand premiere of his former director Taika Waititi's new film Thor: Ragnarok this week.

Dennison, 14, sported longer hair than we're used to seeing him with on the red carpet and looked very happy about the upcoming sequel to the cult R-rated superhero movie.

"I can't wait for everyone to see it - it's been really fun," said Dennison.

He said he wanted to keep details about the film secret, but did agree to give three words describing what working on the sequel was like.

"I'm going to say five - Ryan Reynolds face is beautiful. That's what it was like filming that film."

Dennison was clearly excited to see Thor: Ragnarok, saying he and his friends all love going to every Marvel film.

"Taika's done a great job on it, I think. I really want to see him on-screen... also I love Thor's new haircut."

Thor: Ragnarok opens in New Zealand cinemas tomorrow, while Deadpool 2 is set for a 2018 release.