Prince Harry and Meghan Markle are encouraging people to take part in "acts of compassion" ahead of International Women's Day.
The couple plan to participate in kind acts themselves throughout the month of March, a spokesperson for their charitable foundation said.
It comes just days before the couple's tell-all interview with chat show queen Oprah is set to air.
Teaser clips of the pre-recorded broadcast hit the airwaves while Harry's grandfather Prince Philip remains unwell in hospital, as Oprah promises "no subject will be off-limits".
In one, Harry compares the "unbelievably tough" split from the royal family to the experience of his mother, Princess Diana.
The interview with Oprah will be aired on CBS on Sunday after producers refused to pull the tell-all chat no matter Harry's grandfather Prince Philip’s condition.
What do you think? Share your views in the comments below...
The Duke of Edinburgh, 99, was yesterday moved to a leading heart hospital, St Bartholomew's in London
Buckingham Palace announced that Philip required observation for an existing heart condition.
The Duke and Duchess of Sussex have faced criticism over the timing of the interview, which falls a year after they announced their bombshell split from royal life.
The Queen stripped the pair of their royal, military and sporting patronages in recent weeks, as the one-year anniversary of 'Megxit' came around.
The couple unveiled their charity vision as they announced their departure from royal life.
Their new Archewell website's transformation has made clear their desire for independence in life after royal work, with a new logo focusing on the word 'service.'
The website's homepage had previously included a heartfelt tribute to Harry and Meghan's mums.
They wrote how they believe in the 'best in humanity' as they have experienced it through their "mothers and strangers", and featured photos of their mothers as the site's background.
The site was originally launched in January with a 'Letter for 2021' alongside photos of Harry with Diana and Meghan with her mum Doria Ragland, but it has since been updated.
The new logo shows the letters 'A' and 'W' in a black oval, surrounded by the words 'Service', 'Community', 'Action' and 'Compassion'.
Now, their website has begun featuring a message calling on people to "unleash a groundswell of real acts of compassion for the women in your life and in your community".
Examples of such acts include providing a meal to a woman in need, calling a friend to check in, and helping a parent or neighbour to register for and get their Covid-19 vaccine.
Other examples of how people can help are listed on the website, in sections entitled family care, wellness, food and empowerment.
The Archewell spokeswoman said the couple are hopeful that families and communities everywhere will join in their efforts throughout Women's History Month.
The campaign is said to be the result of in-depth planning with many leaders and organisations focusing on women and women's advocacy.
International Women's Day is on March 8.
