Remember when the Duchess of Cambridge, the Duchess of Cornwall, Queen Letizia and Queen Maxima attended 2019's Order of the Garter ceremony in varying tones of blush and white? The result was some mighty gorgeous pictures, and proof that royals can really make a style statement when they co-ordinate their looks.
Was it done on purpose? We'll never really know, but that doesn't stop us looking back at all the times our favourite royal ladies (and gents) have come over all matchy-matchy for their public engagements.
MORE: Royal ladies' boldest colour-block outfits
Letizia, Camilla, Maxima and Kate gave us a lesson in colour co-ordinating
The Duke and Duchess of Sussex often wear similar shades, while Kate and Prince William have also had some his and hers moments as a couple - and not to mention some of their colour-coordinating outfits from their family album.
Scroll down to see more of our favourite twinning fashion moments!
WATCH: The Countess of Wessex talks about the Queen's colourful style
The Duke and Duchess of Sussex
An incredible moment came when Meghan matched her stunning red Safiyaa gown to Prince Harry's military uniform at the Mountbatten Festival of Music in March 2020.
Meghan and Harry making a statement in red
The Duke and Duchess of Cambridge
William and Kate's matching looks won everyone's hearts during their 2019 royal tour of Pakistan. The Prince's sherwani was designed by Nauman Arfeen while Kate's glittering emerald gown was made by Jenny Packham.
The royal couple looked incredible in green
Duchess Kate and Princess Charlotte
We all swooned when we saw that Kate and Princess Charlotte were matching in pink at 2017's Trooping the Colour!
Kate and daughter Princess Charlotte often match their outfits
King Felipe, Queen Letizia, Princess Leonor and Infanta Sofía
The Spanish royal family were a vision in blue and white during their visit to Mallorca in August 2019.
Matching their outfits to the beautiful blue skies!
MORE: The 7 rare moments that Meghan Markle wore a formal royal gown
Princesses Beatrice and Eugenie
We loved Princess Beatrice and Princess Eugenie's matching white floral looks, also at the 2017 Trooping the Colour ceremony.
Beatrice and Eugenie love to twin with their outfits
The Countess of Wessex and Lady Louise
Sophie and her daughter Lady Louise (and even dad Prince Edward!) looked lovely in navy blue at the Queen's 92nd birthday concert in April 2018.
Sophie and Louise looked beautiful in navy blue
Duchess Kate and Countess Sophie
Do you think Sophie and Kate planned in advance to wear their red party frocks to the UK-Africa Investment Summit at Buckingham Palace?
MORE: Kate Middleton's most show-stopping tiaras revealed
Princess Diana often proudly co-ordinated with her sons. She memorably matched her green and white outfit to Prince Harry's in 1988.
We love this matching shot of Diana and Harry
Meghan and Harry
It was a subtle detail, but eagle-eyed fans noticed that Prince Harry had the lining of his suit matched to wife Meghan's dress for the 2020 Commonwealth Day service.