Matthew Perry has yet again sparked worry and concern amongst his fans after he was spotted looking "exhausted" and "frail" while being helped out of a car.

Keep scrolling for the full story, and to see the worrying photos for yourself...

For months now, fans have been growing more and more concerned for Friends star, Matthew Perry.

via: Getty

The actor has been steadily looking more unwell as the months have trickled by, and his most recent sighting has got fans seriously worried.

But first, let's start from the beginning.

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Most of us first met Matthew in 1994, when he landed the role of Chandler Bing in the infamous TV series, Friends.

The show was an instant hit.

via: IMDB

Created by David Crane and Marta Kauffman, the comedy follows the friends, who live in the same New York apartment block, as they together navigate through the turbulent years of their late twenties.

We all grew to become incredibly attached to these characters.

The show truly made us feel like a member of the Friends gang, even when we were conflicted over whether Ross and Rachel really were on a break or not... FYI they totally were on a break.

The final episode aired in September 2004...

And we watched through our tears as the gang said their final goodbyes to the apartment we had all grown to know and love for the past decade.

But, fifteen years on from Rachel getting off the plane...

We have never found out what happened to the gang. Did Rachel and Ross stay together? Would Monica and Chandler ever get divorced? Did Joey ever make it as a big actor?

Over the years, there have been a few low-key reunions and a lot of false hope...

Apart from the occasional reunion on talk-shows, fans have had their fair share of disappointments when it comes to waiting for a Friends reunion.

A trailer for a Friends movie went viral last year, giving superfans false hope that the sitcom was hitting the box office...

But it wasn't to be. The trailer was quickly confirmed to be fake and, again, our dreams were shattered.

And even the cast have confirmed that a reunion is incredibly unlikely...

Matt Le Blanc left fans heartbroken last year as he rejected calls for the show to return, saying the sitcom simply “wouldn’t be the same" in an interview with the Mail Online. He added, “People want to know what happened to them. But it was about a finite period in a person’s life after college, before you settle down and start a family."

So, yeah. Things haven't been looking too great on the reunion front.

Many worry that, because Friends was about a group of people in their twenties and thirties, it just wouldn't work following the gang through their forties and fifties.

But it seems that, in real life, the cast have remained firm friends throughout the years.

Jennifer Aniston finally joined Instagram last year, and her first post was a selfie of her and the rest of the Friends gang. “And now we’re Instagram FRIENDS too. HI INSTAGRAM," she captioned the post.

The cast have been pictured together more and more in the last couple of months...

Surely this means a definite Friends reunion?!

But one cast member was a little late to the Instagram party.

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Matthew Perry, or Chandler Bing... Or Miss Chanandeler Bong.

Perry became the last Friend to join Instagram in February...

And he made an epic entrance, sharing a video of the famous Chandler Bing dance alongside the caption, "This is how thrilled I am to finally be on Instagram. So, here we go..."

And, during the lockdown, he has been throwing the Friends quotes left, right, and center.

An absolute Chandler Bing classic.

For the most part, his Instagram has been a complete delight.

Matthew has been keeping us all updated with his lockdown antics, including his hilarious naked baking venture.

But some people are still concerned about the star.

Matthew has a lengthy history of addiction issues, along with a variety of health problems. And now, recent sightings of the actor have made fans a little worried.

First, there was this photo.

Posted onto Instagram by his co-star and friend, Courteney Cox last year, Matthew just looked... Different. And we couldn't put our fingers on what it was that was so different. Was it the color of his hair? Did he have cosmetic surgery? Why were his lips that color? The questions were endless.

People were seriously confused.

Is it Matthew? Or is it an impostor posing in his place?

And then, around 6 weeks into the lockdown, more concerning photos emerged.

Matthew was seen walking through the streets of Los Angeles, donning a checkered shirt and black t-shirt combo... And he looked completely exhausted.

He was almost unrecognizable from the Chandler Bing we all knew and love.

via: Instagram

His hair was overgrown, his face was covered in stubble... But, hey, isn't this how we've all looked during this lockdown?

His bedraggled appearance has become somewhat of a meme...

And people have found the funny side by using him as a representation of how lockdown is going for all of us.

But, sadly, he doesn't seem to have got any better in the last few months.

via: Getty

The star has been spotted for the second time during the lockdown, and he looks more exhausted than ever before.

The actor was snapped this week being helped out of a car...

And we have never seen him look so frail. But there may be an explanation for his slightly worrying appearance...

On May 18th, Matthew tweeted about having to get emergency dental surgery.

The actor wrote: "Emergency dental surgery at 6pm. Now that's what I call a hat on a hat."

He hasn't revealed exactly what the dental issue was...

But it could explain his slightly bedraggled appearance.

You can see all the photos of him here.

Let's just hope that it is the dental work that's made him look so under the weather...

Get well soon, Matthew!

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For more on how other celebrities have been coping during lockdown time, keep scrolling...