Jennifer Aniston, Courteney Cox, and Lisa Kudrow have all been slammed this week by fans after uploading a "dangerous" Instagram post.

This is not good...

The Friends girls have landed themselves in some serious hot water this week.

via: Getty Images

Safe to say, after the Instagram post emerged, fans are less than impressed.

Courtney Cox, Jennifer Aniston, and Lisa Kudrow burst onto our screens as the female half of the Friends gang.

From romance and scandals to one very strange poking device and the ever-lasting question as to whether Ross and Rachel were on a break (they definitely were), the sitcom followed the friends as they navigated life living in New York.

But, like with all shows, the popular sitcom sadly came to an end in 2004.

We waved goodbye to the Friends gang in an emotional 2-part finale which saw the group leave Monica's apartment for the very last time, leaving their keys on the counter.

It wasn't all sadness, though.

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Rachel finally admitted that she loved Ross, and Monica and Chandler adopted 2 babies, but it certainly marked the end of an era.

Shortly after the show wrapped up, the cast reunited for The Oprah Winfrey Show.

via: Getty

We got our first taste of a reunion just a day after the last ever Friends episode aired as the show's cast joined Oprah on her show for a one-off interview.

Although all of the cast developed a tight-knit friendship over the years, it seems that the female castmates grew extremely close during filming.

They would reportedly go for lunch every day together while filming the sitcom.

The co-stars certainly have a tight bond.

Its no wonder that they're so close, after all, the stars spent a significant amount of time together while filming the sitcom over the decade.

In fact...

During NBC's Must-See TV: An All-Star Tribute to James Burrows 3 years ago, Jennifer Aniston said that the cast "fell in love with each other" over the years.

She continued:

"We experienced friendship, family, heartbreak, babies, everything, together," the actress revealed.

We've seen our fair share of mini-reunions over the years...

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The entire cast doesn't reunite that often, so fans have had to make do with "half" reunions.

Although we have been blessed with a few nostalgic moments.

3 years ago, the entire cast (minus Mathew Perry) attended the All-Star Tribute to James Burrows event together and it was everything that we've ever wanted.

For the most part, however, it seems that Jennifer Aniston, Courteney Cox, and Lisa Kudrow are the stars who meet up the most.

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The pals have walked the red carpet together several times, but, away from the limelight, they are often spotted together, too.

When the Friends trio did this, fans couldn't believe it...

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While appearing on the Jimmy Kimmel Show in 2014, Aniston, Kudrow, and Cox, or should we say, Rachel, Phoebe, and Monica stepped back into the apartment that they'd left behind a decade ago for a one-off skit.

Fans were love seeing the girls together again...

Can you blame them?

Throughout lockdown the cast members have been reminding fans the importance of taking the pandemic seriously.

Including  the simple act of wearing a mask.

In fact, a week ago, Aniston shared a heartwrenching post on Instagram warning people exactly why they need to take the virus seriously.

“This is our friend Kevin. Perfectly healthy, not one underlying health issue. This is Covid. This is real," she began.

She continued:

“We can’t be so naive to think we can outrun this…if we want this to end, and we do, right? The one step we can take is PLEASE #wearadamnmask."

Both her and Cox have been urging people to wear a mask in recent weeks.

And even posted a video together donning their own.

But this week, both Aniston and Cox as well as Lisa Kudrow have landed themselves in hot water with fans.

via: Getty Images

People are not happy with the trio's latest Instagram post.

Of course, some fans loved the pic.

People can't get enough of the stars.

So, it wasn't all entirely bad.

But there was a fair share of negative comments.

Several people pointed out the same issue after the photo emerged...

and it's not looking good...

The trio reunited once again for the snap yesterday.

via: Getty Images

And, while it seemed innocent enough, fans were less than impressed with what they saw.

Lisa Kudrow took to Instagram to post this snap:

In the caption, she urged people to vote. "Friends don't let friends skip elections. Text FRIENDS to 26797 to make sure you are registered. And tag your friends below to remind them to check their registration," she wrote.

But it clearly didn't have the intended effect...

Because the comments were instantly flooded with fans pointing out a specific detail.

Where are their masks?

Fans began questioning why the trio weren't social distancing or wearing masks around each other.

Of course...

This could very well be an old photo taken before the pandemic.

But if it is a new photo...

Fans are pointing out the hypocrisy, given the fact that the actresses, especially Aniston and Cox, have been very vocal about wearing masks. Yikes.

None of the stars have spoken out about the backlash.

If you want to read more about the Friends cast, scroll on to check out Jennifer Aniston's secret tattoo and the meaning behind it...