Carriage driving trainer Sara Howe commented on their supportive yet private relationship.
"Congratulations to Lady Louise on her graduation from St Andrews University!" stated an official social media post from the monarchy.
The palace noted that officials would not comment further on her future career aspirations.
"He's always been very supportive, but also leaves her alone to get on with the job," Howe said.
She observed that the couple maintains a normal routine and does not request special treatment at public events.
"They've got their own privacy, certainly aren't put out on a pedestal and that nobody can go anywhere near them.
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They're totally the opposite from that," Howe added.
