In view of his 7.8million Twitter followers, Piers penned: “On Monday, I said I didn’t believe Meghan Markle in her Oprah interview.
“I’ve had time to reflect on this opinion, and I still don’t. If you did, OK. Freedom of speech is a hill I’m happy to die on.
“Thanks for all the love, and hate. I’m off to spend more time with my opinions.”
ITV is yet to announce who will replace Piers permanently on GMB.
Good Morning Britain continues weekdays at 6am on ITV.