Dame Helen Mirren and actor Nicholas Hoult are among those who are backing this year's Save the Children Christmas Jumper Day campaign, which is on December 10.
Earlier in November, celebs such as Holly Willoughby, Emma Bunton and Alex Scott already pledged their support for the campaign.
More stars will be taking part in the campaign, including model and actress Poppy Delevingne, model Erin O’Connor and Bafta EE Rising Star winner Bukky Bakray.
Singer Yungblud, actor Will Poulter and activist Munroe Bergdorf also joined Dame Helen in being photographed holding messages from young people about their hope for the future.
The series aims to “give children from communities across the globe a platform to share the changes they want to see in the world – from reducing pollution to ending racism – and share their messages of hope for the future”, according to Save the Children.
Dame Helen is pictured holding a message that reads “Defend the rights of girls”, written by a 14-year-old named Maya from Syria.
Hoult’s sign, “Ban plastic. Reduce pollution”, has been written by siblings James and Isla who attend a school in Wales which is supported by Save the Children.
Skins star Hoult, 31, said: “I think kids are very aware of how non-renewable sources of energy or materials are destroying the Earth around us and that’s what they’re going to have to deal with.”
“We can all see the damage we’re doing to the Earth and, for kids’ futures, we need to change that.”
The pictures have been taken by photographer Misan Harriman, who was the first black male photographer to shoot a British Vogue cover in the 2021 September issue.
It is Save the Children's tenth anniversary of the fundraiser and this year the charity is turning to sustainable methods of support.
The charity hopes this year's Christmas Jumper Day, held on December 10, will be the most sustainable to date.
Each celebrity is pictured wearing a one-off vintage jumper which will be available to purchase from Save the Children outlets on December 1.
Other famous faces taking part include Celebrity chef Andi Oliver, actors Adil Ray and Adam Pearson, soap star Nina Wadia and TV doctor Dr Ranj Singh.
Olympic boxer Nicola Adams and comedian Joel Dommett and Lee Ridley are backing the campaign.
How can I get involved?
People taking part in the campaign are being asked to donate £2 to the charity.
Save the Children are encouraging people to upcycle, borrow or buy a second-hand festive sweater this year.
More than £27 million has been raised over ten years from people taking part in the fundraiser.
Sign up for Save the Children's Christmas Jumper Day 2021 or find out how you can get involved via the charity's website.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here