Old pictures of Vin Diesel have been circulating on Twitter, and they have left the internet in total shock...

Diesel has long been known as the macho man...

But since shocking old photos of the star went viral, no one can look at him the same ever again.

Now, the star took a big risk to kick start his career.

Diesel dropped out of college to create his first flick, Multi-Facial, which was subsequently screened at the Cannes Film Festival back in 1995.

His next movie also got the film festival treatment...

Strays was screened at the 1997 Sundance Film Festival, and soon caught the eye of award-winning director Steven Spielberg.

The Hollywood giant cast the actor in his World War II epic Saving Private Ryan.

The smash-hit film skyrocketed Diesel into the spotlight, introducing him to a mainstream audience.

It was only onwards and upwards from there...

And the rising star soon found big-budget projects heading his way.

In 2001, the star landed his career-defining role in The Fast and the Furious.

Starring as the notorious street racer Dominic Torretto who is investigated by an undercover cop (played by Paul Walker).

The Fast & Furious franchise is one of the most successful in history.

After debuting in 2001, there have been a whopping 8 movies, each and everyone a huge blockbuster smash.

Diesel is a verified Fast & Furious veteran...

Having starred as Dominic in the movies for almost twenty years.

His status as a firm frontrunner in the action genre was further cemented by his leading role in 2002's XXX.

Determined not to be typecasted, soon enough, Diesel attempted to broaden his horizons with the 2005 comedy The Pacifier.  

And, of course...

There was 2006's Find Me Guilty.

But Diesel soon returned to his popular tough-guy persona...

With the release of later installments of the Fast & Furious franchise, including Fast & Furious (2009), Fast Five (2011), Fast & Furious 6 (2013), and Furious 7 (2015).

But, in 2014, the star joined another popular franchise.

Diesel lent his voice to the adorable Groot, a tree-like being in the sci-fi adventure Guardians of the Galaxy.

The superhero flick became an international smash hit.

Going on to gross around $770 million at the box office, with Guardians of the Galaxy 2 (2017) going on to be an even bigger blockbuster.

Diesel also voiced Groot for appearances in other movies...

Including Avengers: Infinity War (2018), Avengers: Endgame (2019), and Ralph Breaks the Internet (2019).

However, some of his later projects have failed to impress.

The likes of Last Witch Hunter and Billy Lynn's Long Halftime Walk barely turned the heads of critics.

Although there is one thing on the cards...

Another Fast & Furious offering.

Fast & Furious 9 is set to be released early next year.

And fans are pretty excited – not least because of the teasers Diesel has been dropping on his social media.

There's no doubt the star has curated a tough guy image on-screen.

His movies have only further reinforced  his macho persona.

But fans are losing their minds after discovering some pretty strange pictures of the star...

With hair!

The pictures have been circulating on Twitter, leaving the internet understandably shook...

He looks so much older... And nowhere near as macho.

For those wondering, the shots are actually from Diesel's 2006 film, Find Me Guilty.

As it turns out, the hair was just a wig, and we're kind of relieved it was. What do you think of the hair? Keep scrolling for all the latest on Fast & Furious 9...