Dame Julie Walters has pulled out of her latest TV role on medical grounds after struggling to recover from severe back pain.
Walters has now made the decision to bow out of the part and will be replaced by Lindsay Duncan.
A spokesperson for Clerkenwell Films said: "Last year, filming on Truelove was paused while Julie Walters sought medical advice and attention for severe back pain.
"Subsequently, Julie has decided to step back from the project to focus on her recovery and recuperation, and so will not be returning to the role of Phil.
"We wholeheartedly support her decision, and the entire cast, crew and production team wish her the very best and a speedy recovery.
"We are delighted that Lindsay Duncan will be stepping into the role of Phil. We're excited to see what she brings to this complex and captivating character when we restart filming later this year."
Watch: Colin Firth dreams of Mamma Mia! 3
Truelove explores the theme of the right to die, following a group of friends who make a pact to achieve their ideal death.
Harry Potter star Walters previously said the script had tempted her out of retirement, having only done TV voiceover work since 2016 Channel 4 drama National Treasure and appearing as housekeeper Mrs Medlock in Jack Thorne's big screen rewrite of The Secret Garden released in 2020.
She said: “I had basically withdrawn from acting and wasn’t sure that anything could tempt me back but then I read Truelove. I was completely bowled over by the writing - the dark humour, the love story and thriller element set against a backdrop of what happens to us all as we approach our later years.
"I adore the character of Phil - smart, funny and hard edged. How often does one have the chance at my tender age to play a leading lady in a TV drama?
"I can’t wait to start and to work with Channel 4 again, a broadcaster with a remit that is so vital to the industry and viewers.”
Walters and Peters - star of The Wire and His Dark Materials - were due to former teenage sweethearts who rekindle their romance after meeting at a funeral. They then make a pact to bow out of life on their own terms.
Peters said: “If your friend reached a soul-destroying level of decrepitude, could you help them transition, if asked? Would it be right, would it be noble, could you do it? Which of that internal triumvirate do you listen to: your head, heart or soul? You know it is illegal in law and scripture to take a life, but could you do it?
"It’s funny, it’s dark and it’s full of twists and turns. And DAMN! To tell this story, with this cast, was something I would have dreaded missing out on…Roll on 'action'!”
The romantic thriller, with dark comedic undertones, also stars Trying's Phil Davis, After Life's Peter Egan, Mum's Karl Johnson, The Split's Fiona Button and Black Mirror's Kiran Sonia Sawar.