All eyes are on dashing British royal Prince Harry in the run-up to the sporting event he founded, the Invictus Games, which begins Sunday in Orlando, Fla. In the games, 500 wounded service members from 15 countries will compete in sports ranging from archery to wheelchair basketball.

Earlier this week, 31-year-old Harry, himself an Afghanistan war veteran, appeared in a hilarious viral video featuring Barack and Michelle Obama and his beloved grandmother, Queen Elizabeth II.

In it, POTUS and FLOTUS bait Harry about the readiness for battle of the American team — a shot across the bow that causes the 90-year-old monarch to raise her eyebrows, saying: “Oh, really?”

Genius charm offensives are becoming increasingly common as the younger generation of royals — who just sneak under the wire as millennials — cleverly use social media to promote themselves and their charitable causes.

Take, for example, the @KensingtonRoyal Twitter feed shared by Harry, Prince William, 33, and his wife, Kate Middleton, 34. Proving they don’t take themselves too seriously, the profile picture is a less-than-flattering snap of the trio wearing matching ’80s-style headbands a la John McEnroe.

But the fun-loving blue bloods aren’t just making their mark on the internet. From the beautifully styled photo shoots of the adorable toddler Prince George and his 1-year-old sister, Charlotte, to superfit Kate gamely joining in sports during her official visits, they offer up a wholesome image that is winning friends and influencing people across the globe.

As a British journalist who has been covering the royals throughout my 27-year career, I can remember a time when the actions of Will and Harry’s parents — not to mention hangers-on like Sarah Ferguson — seriously threatened the crown.

Who can forget haughty Charles and needy Diana and their dismal attempts to dupe the public into thinking their marriage wasn’t a sham?

Or a topless Fergie getting her toes sucked by businessman John Bryan on a 1992 French vacation without her husband, himself nicknamed Randy Andy?

Diana did her manipulative best to be portrayed as the wronged, down-to-earth mom — throughout the late ’80s and ’90s, she was constantly in touch with favored reporters who handled her publicity — but the truth is that Wills and Harry were mostly raised by nannies.

By 1993, when tapes were released of Charles talking dirty with mistress Camilla Parker Bowles (he famously compared himself to her tampon), the boys were caught in the middle of a shameful p.r. war between their mother and father, which left the House of Windsor in turmoil.

Fast-forward a quarter-century and the British monarchy couldn’t be in better shape.

It hasn’t been a smooth road for Harry — who dressed up as a Nazi for a 2005 costume party and frolicked naked in a Las Vegas hotel room in 2012 — but the public has much respect for the former army captain, who risked his life on two tours in Afghanistan.

Following in the footsteps of his late mother, he has the common touch. In an interview with People magazine this week, the Ginger One spoke movingly about the Invictus Games and jokingly claimed that, without a cape and pointy shoes, American kids “are going to be thinking, ‘You ain’t no prince! You’re having a laugh.’ ”

And William has yet to put a foot wrong. He’s kept the media at arm’s length like his father, but hasn’t treated it with contempt. His occasional warm, funny interviews — such as recalling last month how the queen gave him an “almighty bollocking” when he rode his quad bike at Balmoral as a kid — serve only to endear him as he takes on the increasing responsibilities of a future king.

Indeed, the younger royals have learned from the mistakes of their predecessors, who lacked purpose and flaunted their privilege. And with charismatic Harry as their poster boy, they’re conquering the world.