If this isn't a reunion for the ages, we're not sure what is.
In a heartwarming move, Prince William, Duchess Catherine, Prince Harry and Duchess Meghan have collaborated once again for a cause that's close to their hearts, and we couldn't be more thrilled to see it unfold.
The two couples formally parted ways earlier this year after announcing that their two houses would split.
Up until that point, joint initiatives and engagements between the foursome were not uncommon, with several heartwarming charity collaborations being front and centre of their work.
Now that the two couples have gone their separate ways, we've seen them thrive with their own individual social endeavours - Duchess Meghan's charity collaboration with Smart Works being one excellent example.
But now, in a move that's given us the best kind of nostalgia, the young royals have again teamed up to voice a PSA video released in support of mental health.
The three-minute video, which was aired in the UK on Monday evening, is part of an initiative launched by Public Health England for their Every Mind Matters program.
The voiceovers of the royals are heard throughout the video, while the clip itself stars the likes of Glenn Close and Gillian Anderson.
The video was written by Love Actually director Richard Curtis.
According to a report from PEOPLE, the foursome were "really keen" to take part in the campaign.
"It is a really positive project, and all four of them have been involved and they hope it will have a huge impact," they explained.
Prince William begins the voiceover as he says: "Everyone knows that feeling, when life gets on top of us."
Harry then chimes in, saying: "your brother, your mother, your friend, your colleague, your neighbour."
Meghan comes in next, stating: "There are things we can do."
She continues: "From today, there's a new way to help turn things around. Every Mind Matters will show you simple ways to look after your mental health."
Kate ends the poignant narrative, saying: "It'll get you started with a free online plan designed to help you deal with stress, boost your mood, improve your sleep and feel more in control."
WATCH: The fab four step out in Sandringham together. Story continues after video...
Work in the mental health space has long been a passion for the royals.
Under the umbrella of the Royal Foundation, which was previously led by William and Harry, the foursome spearheaded a number of mental health initiatives.
There's no denying how encouraging it is to see the royals reunite once again for such an important cause.