This was not out of the ordinary, with many invited couples similarly split, but the arrangement has still been the subject of much talk in the UK newspapers today.
'Whatever the truth about them supposedly falling out, the attention during the evening would have been humiliating for Kate,' says a royal source.
The appearance follows months of whispers about Kate’s alleged tensions with the former model, who lives a stone’s throw from Kate and William’s home, Amner Hall, with her 58-year-old husband. The two couples were once said to be close friends but UK reports have stated they have recently drifted apart.
Daily Mail diarist Richard Eden oddly described Rose as ‘a rival to [Kate’s] rural crown’.
‘On the face of it, it’s bizarre, but Kate seems to see Rose as a rival,’ he quoted a source as saying.
Whatever the nature of their alleged falling out, it seems that duty comes first, and all concerned made it through the night with their tiaras intact.