PIERS Morgan has doubled down on his controversial claims about Meghan Markle's mental health by saying he still "doesn't believe" her.

The former Good Morning Britain presenter, who was sacked by ITV for criticising the Duchess of Sussex's mental health claims, stuck to his guns in a tweet on Monday.

Morgan, from Newick in Sussex, began Mental Health Week with a quote from Rocky Balboa that he found "helpful in tough times".

The post prompted one fan to ask if Piers now "believes in mental health", months after he was sacked from the popular morning TV show.

True to his sharp and confrontational style, he responded and said: "I believe in mental illness, I just don't believe Meghan Markle."

The Argus: Piers Morgan following his sacking from Good Morning Britain Piers Morgan following his sacking from Good Morning Britain

The feud began following the bombshell Oprah interview, where Harry and Meghan, now living in the US, made a number of explosive revelations.

Among them an allegation that a member of the family – not the Queen or Duke of Edinburgh – had made a racist comment about their unborn son, Archie.

During the interview, which first aired in the US and was broadcast on ITV, Meghan spoke openly about her mental health, telling Oprah she had had suicidal thoughts and had asked to go somewhere to get help, but was told it would not look good by one of the most senior people in the institution.

She told Oprah: “I was ashamed to say it at the time and ashamed to have to admit it to Harry.

“But I knew that if I didn’t say it, then I would do it. I just didn’t want to be alive anymore.

“That was a clear and real and frightening and constant thought.”

The following morning on GMB, Morgan dismissed the claims before storming off the show after a confrontation with weather presenter Alex Beresford.

He said at the time: “I’m sorry, I don’t believe a word she says.

“I wouldn’t believe her if she read me a weather report.”

His comments were criticised by mental health charity Mind and TV watchdog Ofcom launched an investigation into the presenter's comments.

The organisation received more than 41,000 complaints about his remarks.