In a statement, the presenter said he was exiting the ITV daytime show.
In a statement, the former host said: “I have always been proud to cover fascinating stories on This Morning. But recently, This Morning itself has become the story.
“Throughout my career in TV – including the very difficult last few days – I have always done my best to be honourable and kind. I understand that ITV has decided the current situation can’t go on, and I want to do what I can to protect the show that I love.
“So I have agreed to step down from This Morning with immediate effect, in the hope that the show can move forward to a bright future. I’d like to thank everyone who has supported me – especially This Morning’s amazing viewers – and I’ll see you all for the Soap Awards next month.”
Holly Willoughby said of her co-host’s departure: “It’s been over 13 great years presenting This Morning with Phil and I want to take this opportunity to thank him for all of his knowledge, his experience and his humour. The sofa won’t feel the same without him.”
ITV’s Managing Director, Media and Entertainment Kevin Lygo said: “Phillip is hands down one of the best broadcasters of his generation and we thank him for his two decades worth of absolutely terrific television on the This Morning sofa.
“This Morning is made by one of the best and most diligent teams in television, who produce over 12 hours of live television each week.
“We look forward to continuing our relationship with Phillip starting with The British Soap Awards in June and a brand new peak time series to come.”
Holly Willoughby will return to This Morning on Monday 5th June after an early May half term holiday and is expected to co-host with other This Morning family members.
Phillip joined This Morning in 2002, originally co-hosting with Fern Britton until she quit the show in 2009.
Holly was brought in as her replacement after Phil lobbied for her to get the job, having already built a professional relationship while hosting Dancing On Ice together since 2006.
Over the years, Phillip and Holly became known for their off-screen friendship as well as their on-screen partnership, which was characterised by giggling, innuendos and good humour.
She also supported him after he publicly came out as gay live on the show in February 2020.
However, in May 2022 tabloid reports emerged that there was reportedly a rift between the presenters that meant they were “barely speaking” when the cameras were off.
Phillip issued a statement claiming he and Holly were “still best of friends”, and described her as his “rock”.
However, he admitted the previous “few weeks haven’t been easy for either of us”, following his brother’s recent conviction for sexually abusing a teenage boy over a period of three years.
Phillip’s denial of a rift with Holly did nothing to dampen the rumours, with various claims made in the tabloids that bosses were looking to shake things up behind the scenes.
Holly and ITV did not publicly comment on the state of the presenters’ relationship or their future on the show after previously being contacted by HuffPost UK.
This Morning airs weekdays at 10am on ITV.