Watch The Rock and Siri take a selfie in space in new Apple movie

Dwayne 'The Rock' Johnson and Siri, the iPhone's personal assistant, have teamed up to co-star in a new film.

No, this is not a very late April Fools' joke and yes, it is real. The film might only be three minutes and 45 seconds long, and is being shown on YouTube instead of in cinemas, but regardless this is Apple's latest attempt to drum up some publicity for Siri.

The extended advert begins with The Rock working out (of course it does), while simultaneously trimming a bonsai tree, before calling upon Siri to help him through his day. But, this being The Rock, it isn't any old day.

First he hails a taxi from Uber rival Lyft, then commandeers the car and drives to the airport.

Here, he inexplicably hijacks an airplane and flies to Rome, where he repaints the ceiling of the Sistine Chapel, before launching a new clothing line in Japan, working as a chef (complete with "I can smell what The Rock is cooking" gag), and performing on stage at a Chinese music festival.

Oh, and then he takes a selfie in space, before crash landing onto the set of a sci-fi film he's been working on, and walking away.

It's a busy day by anyone's standard and, frankly, we want to know the secret to Johnson's iPhone 7 battery going the distance - and while we're at it, which phone network offers coverage in orbit.

On his Facebook page Johnson describes the film, called Dominate The Day, as "the biggest, coolest, craziest, doped, most over the top, funnest (is that even a word?) movie ever...I make movies for the world to enjoy and we also made this one to motivate you to get out there and get the job done."

Siri might well need a helping hand at the moment, as Amazon, Google and Samsung have all recently launched themselves into the voice assistant market with Alexa, Assistant and Bixby respectably. Siri is due a range of improvements with the iPhone's new iOS 11 software, out in the autumn, and will be used to control Apple's upcoming HomePod speaker, a crucial but expensive response to the popular Amazon Echo and Google Home.