However, royal aides have dismissed any accusations that a breach in protocol occurred, adding that both Kate and Prince William want people to feel comfortable around them.
Indeed, a palace source told PEOPLE earlier this month: “When they’re meeting people, they want to have a conversation without the other person worrying too much about how to address them.”
The source added: “The message is, address them in whatever way you feel most comfortable.”
But this is a different generation of royals. William and Kate famously engaged in some surprising PDA at the 2012 Olympics. Clearly, besides being tradition-shattering, this is a hands-on couple.
Watch the video below and tell us: Do you think James was too familiar with Kate?
• Reporting by SIMON PERRY