Rupert Grint gets a lot of praise by director Fredrik Bond and co-star James Buckley. (The Necessary Death of Charlie Countryman)

Bond: When everybody started working it was like being creative people, all the ‘celebrity’ part of it disappears out the window, it’s about here and now and what we’re working completely. And you know the whole cast that we had was exactly like that. Shia didn’t come with an assistant, Evan didn’t come with an assistant, it was just about the work. It was just getting it, and Mads Mikkelsen the same thing.
Buckley: And Rupert the same thing.
Bond: Rupert as well.
Buckley: I keep forgetting that he’s a mega, mega star.
Bond: Me too!
Buckley: It’s so easy to just forget that. Cause you just talk to him and he’s just so nice and so fun to be around, like you go for a beer with him afterwards and stuff and he’s just again, he’s just a bloke. And then you forget that his films have just smashed every record that exists and that everyone on the planet knows who he is. It was really lucky, it was so great that everyone was on the same page and wanted the same thing.