Eminem and Ed Sheeran have collaborated on a couple of songs, despite their big generational difference.

There are also good buddies, thanks to their mutual interest in cassettes and the Marvel universe.

In a recent interview with the BBC, Sheeran says he and Shady are "pen-pals" who send each other cassettes.

“I collect cassettes and I’ve got Ray Charles and Stevie Wonder and they are quite difficult to find,” he said. “The only person I know who collects the same is Eminem. He collects cassettes – that’s his thing. He loves collecting. He is avid at going to find them. We have started having this, it’s like a very cool pen-pal thing.

“I got a message the other day about an LL COOL J cassette. He said, ‘This is the cassette which made me want to start rapping.’ I sent him Van Morrison and I will send him David Gray’s White Ladder next.”

In an interview with Apple Music last year, Sheeran revealed cassettes aren't the only thing he has in common with the Rap God.

“The first time we met, we didn’t make music,” he said. “I hung out there for about four hours and we just spoke Marvel and Avengers for about four hours. And then the next time I went back, we made a tune. The first tune we made, I was in Mexico and his producer flew to Mexico and I did the hook there and stuff.”