With all the kerfuffle about the making and release of 'Don't Worry Darling', you'd almost forget that there was an actual film to watch, too.

Not only that, but that one of the biggest pop stars on the planet, i.e. Harry Styles, was in the lead role.

A song from the film's soundtrack, featuring Styles playing piano and his co-star Florence Pugh on vocals, has been made available online.

It's called 'With You All the Time' and as director Olivia Wilde revealed in a recent interview with Variety, it came together very quickly.

She said that Styles had called her while working on the film and asked her about it. “Harry called me and said, ‘What’s the trigger song? Like, what’s the melody?’," she said. "I said, ‘I don’t know. I’m going to different writers to write it. Do you have anything in mind?’ And he said, ‘I’ll think about it.’”

She says that five minutes later, "he sent me a demo from his piano, and it was what ended up in the film. And I was like, ‘Yeah, that’s it. That’s it. And that’s really insane that you did that in five minutes."

Styles, meanwhile, said of the song: “I wanted something that could be both sweet and creepy, entirely dependent on the context. I remember first playing it on the piano, and it had a sort of homemade nursery rhyme feel to it."

Hear 'With You All the Time' below: