Avengers: Infinity War is destined to be one of the biggest movies of all time, literally. It has a cast of dozens, combining The Avengers, Guardians of the Galaxy, Thanos, his “children,” and many other supporting characters from 10 years’ worth of Marvel Studios movies. One of those Avengers, Chris Hemsworth (Thor), expects moviegoers to be fairly impressed when they see the film this May.

Speaking with Postmedia Network (via The Toronto Sun), Hemsworth provides an idea of the scale of both Avengers: Infinity War and the unofficially titled Avengers 4.

“They’re going to be massive. I finished literally two days ago and I looked at [directors] Joe and Anthony [Russo] and said, ‘I don’t know how you guys have gotten this far and I don’t know how you’re going to hold it together and complete this thing, but my hat’s off to you.’

“This is one of the biggest things in film history and to be a part of it was just incredible. I think what these characters are about to face — with Thanos — there’s been nothing quite like it. There are 76 cast members or something like that. I think what people are going to be excited about is what I was excited about and that’s Thor meeting the Guardians and Iron Man meeting Doctor Strange.”

It’s not all about meet cutes and action, however, as Hemsworth assures Postmedia Network that the relationships between the characters will develop and make an impact.

“The interactions between all of these characters and the different sorts of chemistry and the relationships that are formed is something that people are going to be pretty blown away by.”

The Russo Brothers and screenwriters Christopher Markus and Stephen McFeely did a fantastic and surprisingly economical job of establishing and developing relationships between characters in Captain America: Civil War. The first meeting between Tony Stark (Robert Downey, Jr.) and Peter Parker (Tom Holland) was a master class in what the writers and directors will have to do many times over in these next two Avengers movies.

Hemsworth sounds extremely confident, which helps, but the best sign that the Russos are up to the task is their previous Marvel work.

Avengers: Infinity War is in theaters May 4, 2018 with Avengers 4 to follow on May 3, 2019.