The Cambridges and the Sussexes are celebrating this significant milestone together

The two households are both celebrating the work of the incredible team at Shout UK, a text messaging helpline for people in crisis which the Fab Four helped launch earlier this year.

The Duke and Duchess of Cambridge and the Duke and Duchess of Sussex, fondly referred to as the Fab Four, have taken the time to celebrate an incredible milestone reached by the initiative they launched together, Shout UK.
Shout UK, which was launched by the four royals in May, is a free text messaging helpline for those experiencing mental health challenges to find a safe space to seek help and support.
An extension of The Royal Foundation's Heads Together campaign, despite Harry and Meghan recently breaking away from the charity they headed with William and Kate, it's clear they're still committed to the initiatives they'd all worked on together prior to the split.
Almost two months since its launch, both the Kensington Palace and Sussex Royal Instagram pages shared a congratulatory post to the team at Shout UK, who have now taken 100,000 text conversations, equating to around 4 million messages of support.
Reposting a post from the official Shout UK Instagram page, Kensington Palace congratulated the team and explained: "Shout operates 24/7 and connects people in need to trained volunteers who provide help at a time when it is most needed; enabling them to move from a moment of crisis to a calm state and form a plan for next steps to find longer-term support."

Better supporting mental health and wellbeing is a big focus for all four of the royals, with Heads Together being a campaign launched by William, Kate and Harry two years ago via The Royal Foundation, to work to tackle the stigma surrounding mental health.
However while The Duke and Duchess of Sussex announced their split from The Royal Foundation in June to set up their own charity, recently announced as Sussex Royal The Foundation of the Duke and Duchess of Sussex, it's clear the Fab Four will still be working on joint initiatives together.
Despite splitting from The Royal Foundation, Harry and Meghan are clearly still dedicated on to working with William and Kate for joint causes. (Image: Getty)
While the split sparked speculation that not all was well between the two couples however royal experts have said the shift is more likely to be a shift in the priorities of Harry and William since the foundation started in 2009 – both having very different roles in the future of the royal family and both now having their own families.
The two families have also been spotted on a family outing earlier this month when the Cambridges and the Sussexes attended the royal charity polo match. The outing also marked the first time nearly three-month-old Archie was spotted in public with his cousins Prince George, 6, Princess Charlotte, 4, and Prince Louis, 1.