Dwayne 'The Rock' Johnson making his rap debut

Dwayne 'The Rock' Johnson is making his rap debut.

The 49-year-old former wrestler will appear on Tech N9ne's new single, Face Off, after the rapper - who he first met on the set of Ballers - reached out to ask for the collaboration.

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He told Variety: "I love music. Anytime in my movies when I can implement some musical elements, I always love doing that."

Tech N9ne added: "The biggest star in the world said something back to me! You know what I'm saying? I am hyped. We are all hyped!"

Dwayne admitted other rapper friends have asked him to appear on their songs but he has always refused until now.

He said: "A lot of my friends who are hip hop artists - like big names - I've been asked a few times. But it just has to feel right.

"When Tech texted me, I knew I would make this work. We're aligned, just in terms of our work ethic and desire. When Tech and I first met years ago on the set of Ballers, we were talking about this idea about being the hardest worker in the room.

"He said something that I really appreciated, basically, 'There could never be enough food in this room or on this set that could make me full because I always want to be hungry.' I just love that."

Tech added: "This is an energy song. This is going to get people pumped up to lift weights, pumped up for fights, pumped up for the game. Period. And what better person? Not Conor McGregor. I don't know him. I know The Rock."