Johnny Depp has claimed he was left broke after losing his entire $650 million movie fortune and wracking up $100 million in debt.

The actor, 57, returned to London's High Court today for a fifth day giving testimony as part of his libel case against News Group Newspapers.

During today's testimony, Depp lifted the lid on his finances - revealing he lost his entire earnings from the lucrative Pirates of the Caribbean franchise.

He told the court that after his fortune was wipes out, he was left $100 million in debt due to spiralling tax bills.

Depp said he found out the bad news shortly before his ex-wife Amber Heard's 30th birthday party on April 21 2016.

Johnny Depp outside London's High Court today

He had a meeting at which he discovered his former business managers had cost him a huge amount of money.

The actor's lawyer, David Sherborne asked: "Can I ask how much?"

Depp replied: "It was put to me this way. It was put to me since Pirates II and III I had made - and it seems a ludicrous number - $650 million.

"When I fired them for the right reasons I had not only lost the $650 million but I was $100 million in the hole because they had not paid the government my taxes for 17 years.

"It was a bad meeting.''

Johnny Depp as Captain Jack Sparrow in Pirates of the Caribbean

Depp smoked a joint on his way to Heard's party to calm himself down.

He then told the court he went to bed to read a book and claims Heard attacked him for ruining her party

He said he had withdrawn because he "felt it was the best thing to do" to remove himself from the argument.

Johnny Depp's ex-wife Amber Heard outside court today

He had been "harangued" by Heard after turning up to her party late.

Depp said she attacked him swinging "haymakers". Asked what one was he relied: "It's a bit of a wild swing but effective if it reaches the target.''

Johnny Depp libel trial latest

Depp has denied he was ever violent towards his ex-wife and has accused her of abusing him during their marriage.

Lawyers for NGN are defending their case based on Heard's 14 allegations of abuse, which include claims of bust-ups between 2013 and 2016.

The actor has argued his ex-wife was abusive towards him during the marriage, which collapsed in 2016.

The case continues.