Prince William has been left devastated this week for a very big reason...

And his revelation has broken the internet's heart, too.

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The news concerns his 7-year-old son, George.

Prince William is said to be devastated...

And we're not surprised!

People have had some strong reactions.

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And it's certainly not hard to see why.

The British Royal Family is one of most famous families in the world.

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Yes, even more famous than our beloved Kardashians.

But, of the many members of the British family...

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The Duke and Duchess of Cambridge, or William and Kate, as we know them best, are the firm favorites of the younger, more modern monarchy.

They have long been royal favorites.

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Following their lavish, and highly documented royal wedding in 2011, Wills and Kate were thrown into the media spotlight, and we still can't get enough of them.

They met while studying at university.

William, who is the son of Prince Charles and in line for the throne, met Kate at the University of St Andrew's in Scotland in 2001.

Though their relationship was on and off for years...

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They clearly couldn't stay away from each other, and their engagement was announced in 2010, 9 years after they first met.

And, ever since, we have followed them as their own little family grew.

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In July 2013, Prince George Alexander Louis of Cambridge was born, becoming the third in line to the throne of Great Britain. Kate emerged from St. Mary's hospital in London in a blue polka dot dress, which many saw as a fitting tribute to Princess Diana, who wore a similar spotty attire herself some thirty-one years earlier.

Princess Charlotte followed shortly after.

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Princess Charlotte Elizabeth Diana was born in May 2015, just under 2 years after her older brother.

The princess has actually made royal history.

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Princess Charlotte became the first female royal to retain her claim to the throne, despite having a younger brother. Before the Succession to the Crown Act 2013, the birth of a son meant that he would leap over any older daughters in the line of succession.

Traditionally, Prince Louis would have overtaken Charlotte in the line to the throne.

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But, now that Princess Charlotte hasn't been ruled out by gender, Prince Louis remains fifth-in-line to the throne, while Charlotte is fourth-in-line behind her older brother, Prince George.

So, as you can see...

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William and Kate really are paving the path to a more modern monarchy.

I mean we all remember the iconic pictures of Kate in her student fashion show.

Since becoming the Duchess, Kate's style has evolved into something unparalleled.

And that fashion gene seems to have been passed down to their children...

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As the adorable princes and princess clearly get their style from their parents. In fact, they look identical...

The photos are too cute for words...

Prince George and Prince William could literally be the same person!

How adorable?

This is quite simply one of the sweetest things we've seen.

It's now been nearly a decade since William and Kate tied the knot...

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And their kids are growing up fast!

But this week, news surfaced that one of the children has been having a tough time.

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And there's a big reason for it.

It seems, as they've got older, the kids have become very passionate about the environment.

And that's thanks in no small part to the slew of popular documentaries from David Attenborough.

All 3 kids are said to be huge fans...

And even featured in an adorable video asking the naturalist some questions about animals and extinction.

But Attenborough's words of wisdom seem to have hit home with one of the kids in particular...

... Prince George.

The 7-year-old recently sat down with his family to watch Attenborough's latest BBC documentary, Extinction: The Facts.

Speaking at the launch of the Earthshot Prize, Prince William spoke about watching the documentary with George. "Having watched so many David Attenborough documentaries recently with my children, they absolutely love them, the most recent one—the extinction one—actually George and I had to turn it off, we got so sad about it halfway through," William said, as per Sky News reports.

George simply found the documentary too upsetting...

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"He said to me, 'You know, I don't want to watch this anymore.'"

He continued.

"[George asked]'Why has it come to this?' And you know, he's 7-years-old and he's asking me these questions already. He really feels it, and I think 7-seven-year-old out there can relate to that."

Prince William added that as parents, it's important to act now.

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"I really feel from an emotional point of view as well, I think every parent, everyone wants to do the best for their children, and I think we have to have a decade of change, a decade of repairing the planet so that we can hand it on to the next generation and future generations and sustain the prosperity for their lives too."

William is already trying to make a difference...

Launched last week, William's £50 million (around $65 million) Earthshot Prize initiative will see 5 prizes of £1 million each awarded every ($1, 304,295) year for the next decade, to people and entities creating positive environmental change.

To see why George got so upset, you can watch a snippet from Extinction: The Facts below.

If you want to read more on William and Kate, scroll on to see what happened when a body language expert analyzed their relationship with their kids...