Elon Musk challenges Johnny Depp to cage fight after actor earlier threatened to cut off his penis

Elon Musk has challenged Johnny Depp to a cage fight after the actor accused him of having an affair with his then-wife Amber Heard.

During his libel trial against NGN, the High Court was shown a text that Depp sent to his friend Christian Carino in which he threatened to cut off Musk's penis.

But the Tesla billionaire has now laughed off the threat, jokingly telling the New York Times : "If Johnny wants a cage fight, just let me know."

Depp had texted: "I'll show him things he's never seen before like the other side of his d**k when I slice it off."

Musk has denied having an affair with Heard, saying their relationship started after her marriage to Depp had come to an end. He also denied the claims he had a threesome with Heard, 34, and model Cara Delevingne, 27, in Depp’s LA penthouse

Musk added: "We did not have the threesome, you know. So I think people think these things are generally more salacious than they are."

He also had advice for the former couple, saying: "For the two of them, I would just recommend that they bury the hatchet and move on."

Depp is suing News Group Newspapers (NGN) over a headline in The Sun labelling him a "wife beater" over allegations he was physically abusive to his then-wife Heard.