Prince William was seen giving his mother-in-law Carole Middleton a helping hand - quite literally - as they reunited at Royal Ascot on Wednesday.
Kate's parents Carole and Michael were making their first public appearance of the year following news of their daughter's cancer diagnosis.
They were warmly greeted by members of the royal family in the parade ring, including William's cousins, Zara and her husband Mike Tindall, Princess Beatrice and her husband Edoardo Mapelli Mozzi, and Princess Eugenie and her spouse Jack Brooksbank.
William was especially pleased to see them - and proved himself to be an absolute gentleman when Carole's heel got stuck in the grass, reaching out to offer his hand as she pulled herself free.
The Prince has always had a close bond with his in-laws, and that has only strengthened in the wake of Kate's illness. Carole and Michael have rallied around the family and proved to be an invaluable support.
Meghan Markle 'to unleash her own memoirs' as Prince Harry's drops next weekRoyal commentator and biographer Duncan Larcombe previously : "William is very much like the adopted son to Carole and Michael Middleton - and he always has been. One of the things that has clearly strengthened William and Kate's relationship from the beginning was the fact that Kate came from a very tight-knit family. It is something that he has kind of lacked in his life, obviously losing his mother. So it is only natural [Carole and Michael] will step into the breach and support [the Waleses] throughout this in every way.
"The Middletons are the perfect antidote really to the pomp and pageantry of the , because they are quite an ordinary family unit, which will be important to help aid Kate's recovery. I think what we will see now over the next coming weeks and months is William really focusing on the Middleton family and really being that adopted son."
Royal fans were buoyed to see Princess Kate make her long-awaited return to the public eye at the weekend as she joined the royal family for the Trooping the Colour.
The 42-year-old looked happy and well as she took part in the annual event. Touchingly, she stood next to her father-in-law the King - who has been facing his own cancer battle - on the balcony of Buckingham Palace as the royals gathered to watch the Red Arrows flypast.
According to the 's Rebecca English, Kate chose to make her return at the Trooping the Colour as a show of support.
"In order for the youngsters to be there and play a full role - riding in a carriage on The Mall, watching proceedings on Horse Guards and joining the family 'balcony moment' - Mummy needed to be there too to keep the 'kiddies' (as she calls her young brood) in check as Papa [ ] was on horseback.
"For Kate, there was also a determination to support the father-in-law she has become increasingly close to over the years and with whom she now shares the unenviable bond of a serious health battle."