Sitting at the kitchen island of their family home in Holland Park, London, Harper reads: "Hi, I'm Harper. I'm six, almost seven and I love books and my family too. Which is Cruz, Romeo, Brooklyn, mummy and daddy."
The 44-year-old's followers were quick to comment on the adorable video, with many expressing their delight over the six-year-old's "refined" and "articulate" delivery.
"Omg, so precious and so well spoken!!!" one wrote, while another joked: "I only want kids if they sound this posh."
"She's got a lovely sound to her voice she'd make a brilliant animate person," another added.
A fourth noted: "I love her tone, good job Mrs Beckham."
This isn't the first time the pop-star-turned-fashion-designer has shared images and videos of her only daughter to social media. In fact, she recently came under fire after revealing the youngster had celebrated her sixth birthday at Buckingham Palace.
Both Victoria and husband David recorded the special moment on social media, with a handful of photos showing Harper surrounded by a host of friends and a real-life princess -- the Queen's granddaughter, Princess Eugenie of York.
And it wasn't long before fans (and trolls) began to question how the famous family snagged the exclusive invitation, with many postulating the palace may have been hired as a party venue.
"Is this a new commercial venture by the Royal family or do all little princesses now get an invite?" one commenter wrote.
Another penned: "If you have enough money you can get anything!!"
The retired soccer superstar was quick to address the backlash, revealing that the family had been invited to the iconic location for a special tea party.
"Just to be clear this wasn't the palace opening the gates for Harper's birthday party," he wrote on Instagram. "This was a tea party where us and other guests were invited so it was a beautiful thing to do with My mum , Harper plus a few school friends... We were honored to be able to there... Beautiful tea party...."
But speaking with the Mail Online, royal expert Robert Jobson said he had never heard of such an invitation being extended to non-family members before.
"It seems odd to me that if you have the money or connections they the Palace - a building funded by the British taxpayer - can be used in this way for a selected few," he said.
"The palace is undergoing a huge renovation in the coming years at a cost of multi millions to the British taxpayer. If this is a new policy to make money it should be clear and open to everyone."
"If it is just for the rich and famous it is simply not right. The palace is used by the Queen and members of the royal family to host receptions to promote the National interest, for diplomacy or say to thanks our sporting heroes, such as our great Olympians."
Whichever way you want to look at it, one thing's for certain: a six-year-old girl had a great birthday. And that's all that matters.
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