Jake Paul furiously storms off Piers Morgan's TV show mid-interview after dropping brutal insult

Jake Paul dramatically cut short a fiery interview with Piers Morgan after a foul-mouth tirade in which he branded the controversial TV host a 'fat a**'.

The YouTuber-turned-boxing star appeared on 'Piers Morgan Uncensored' ahead of his latest fight, against Julio Cesar Chavez Jr. in Anaheim on June 28.

But he stormed off the show in fury after Morgan questioned his boxing resume.  

'YouTube this, YouTube that, Disney that. This s*** is not a joke. I'm knocking out the best of the best. You vs. going to the gym... you're still a fat a**,' Paul said.

'I think the problem here, Piers, is that you think that your opinion matters,' he later told the TV anchor.

When Morgan questioned why, then, he had come on the show, the YouTuber said: 'I'm just taking your audience to sell Pay-Per-Views. I don't give a f*** about your show. 

WARNING - OBSCENE LANGUAGE

'You dumb a**. This is a f***ing business enterprise. Buy the Pay-Per-View on Saturday, June 28 - me vs Julio Cesar Chavez Jr. Thank you, tune in everybody.'

Paul then dropped off the Zoom call, prompting hysterical laughter from Morgan, who said: 'Cheers Jake, really enjoyed that. And good luck to Julio. Knock him out for all of us, will you?'

Earlier, the TV host had called out Paul over his 11-1 record in professional boxing. 'The only proper boxer you've fought was Tommy Fury and he beat you,' he said. 

'Peak (Mike) Tyson you wouldn't have lasted 10 seconds... Canelo Alvarez says he would potentially kill you!'

Only a few minutes earlier, Paul and Morgan were sharing a laugh as they kicked off the interview.

The YouTuber-turned-fighter wore a giant sombrero and when it was suggested that he might be guilty of cultural appropriation, Paul joked: 'I'm the greatest Mexican fighter of all time, Piers, I don't know what you're talking about!'

That drew a laugh from the anchor, who then quizzed Paul on his opponent. The 28-year-old branded Chavez - the son and namesake of an all-time boxing great - a 'dumba**' and 'easy work.'

Paul is returning to the ring for the first time since his controversial win over 'Iron' Mike Tyson last November.

Tyson is more than three decades older than the YouTuber-turned-boxer, who coasted to a points win over the former heavyweight champion in Texas.