“Carry out a random act of kindness, with no expectation of reward, safe in the knowledge that one day someone might do the same for you,” the quote read on a blue background that features Meghan and Harry’s joint monogram, per PEOPLE.
In a caption, they wrote: “Words have the power to inspire, which is why we’re happy to share some of our favourite quotes.
“From members of the public to public figures, from teachers and students to young leaders, we begin with a quote from Diana, Princess of Wales.”
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The post marks the first time that they’ve mentioned Princess Diana on their Instagram. Since her untimely death, Harry has remained close to Diana’s sisters, Lady Sarah McCorquodale and Lady Jane Fellowes. Both are featured in the family portrait of Harry and Meghan after they celebrated the christening of their son, Archie Harrison, last month.
“Harry is close to Diana’s family,” a royal source told PEOPLE. “It meant a lot to them to share a photo of their full family.”
A family friend says the inclusion of the Spencers “is typical of both William and Harry to say in a very, very gentle way, ‘This is the family of our mother, and we want to reflect that.’ She is always in their hearts, but this is a public way of saying that she is still on their minds.”
During an interview after his engagement in 2017, Harry noted that his mom would have loved his now-wife.
“They’d be thick as thieves, without question,” he said. “I think she would be over the moon, jumping up and down, so excited for me. But I think she would have been best friends with Meghan.”