He is set to return as Neo in the fourth installment of The Matrix.

And following the release of a teaser trailer for The Matrix Resurrections, Keanu Reeves was seen making a low-key appearance in Berlin on Tuesday.

The actor, 57, was spotted stepping out of the Stue Hotel in the city, as a cryptic teaser for the eagerly-anticipated dropped ahead of the first trailer.

Stepping out: Keanu Reeves was seen making a low-key appearance in Berlin on Tuesday

Keanu opted for a dark-coloured ensemble, as he sported a grey suit jacket with a black T-shirt and jeans, while he also wrapped a black hoodie around his shoulders.

He added a pair of slip on shoes, a black beanie hat and a backpack to his outfit.

Keanu’s long black hair was poking out from underneath the hat and he was sporting a smattering of salt’n’pepper stubble.

Big things! The actor, 57, was spotted stepping out of the Stue Hotel in the city, as a cryptic teaser for the eagerly-anticipated dropped ahead of the first trailer

After leaving the hotel the screen star was spotted getting into a nearby car.

Anticipation for The Matrix Resurrections, the surprise fourth instalment in the science-fiction franchise, has begun with a new poster teasing the release of its first trailer.

The film comes 18-years after The Matrix Revolutions, originally intended to be the final chapter in a trilogy documenting the transformation of computer hacker  Thomas Anderson into cybercriminal Neo after he inadvertently discovers the ordinary world he inhabits is a simulated reality.

Stretching out the anticipation, fans were treated with an ad for the promotional launch featuring red and blue pills sit side by side beneath the stark message: ‘The choice is yours.’

Fans of the popular franchise will recognise the pills as a decisive option given to Neo, played by Keanu Reeves, as he chooses between life in the war-ravaged real world or the ‘beautiful prison’ of alternate reality.

Heading out: After leaving the hotel the screen star was spotted getting into a nearby car

Rugged: Keanu’s long black hair was poking out from underneath the hat and he was sporting a smattering of salt’n’pepper stubble

Low-key: Keanu opted for a dark-coloured ensemble, as he sported a grey suit jacket with a black T-shirt and jeans, while he also wrapped a black hoodie around his shoulders

Piercing static serves as the backdrop, as tiny strings of Matrix code are seen falling down inside the pills before the entire scene melts.

The trailer invited fans to continue their saga on WhatIsTheMatrix.com, an interactive choose-your-own-adventure style site.

Presented with the same choice there, red takes you down a rabbit hole where you’re told: ‘This is the moment for you to show us what’s real.’

Then scenes from the film flash, showing the thin barrier between reality and the artificial world known as The Matrix.

Pick: ‘The choice is your,’ appeared against a white background, beckoning the audience to pick a red pill or a blue pill

Ready for action: The Matrix Resurrections got their buzz started by teasing the first official trailer for the film online Tuesday

Reality: The red pill takes you down a rabbit hole where you’re told: ‘This is the moment for you to show us what’s real’

‘This could be this is the first day of the rest of your life, but if you want it, you gotta fight for it,’ the narration wraps while showing star Keanu Reeves ready to fight.

Picking the blue pill offered another path, asking viewers: ‘Do you remember how you got here?’

‘You’ve lost your capacity to discern reality from fiction,’ the narrator says before several surreal scenes flash by.

Memory: Picking the blue pill offered another path, asking viewers ‘Do you remember how you got here?’ and showing some surreal scenes

‘What’s real is here and now… Anything else is just your mind playing tricks on you.’

‘It becomes a problem when fantasies endanger us,’ they warn as someone is seen pouring out a bottle of blue pills.

Then, ending on a sinister note, they show someone touching the computer port at the back of their head and ask: ‘We don’t want anyone to get hurt, do we?’

Antidote: ‘It becomes a problem when fantasies endanger us,’ they warn as someone is seen pouring out a bottle of blue pills

Choose your adventure: The first full trailer for The Matrix Resurrections comes out Thursday, September 9th at 6am PST

Though HBO offered few details about the movie’s plot, they weren’t lacking enthusiasm in their official description.

The network’s description reads: ‘Plug into The Matrix Resurrections the long-awaited fourth film in the groundbreaking franchise that blew minds, and redefined a genre.

‘From visionary filmmaker Lana Wachowski, the new film reunites original stars Keanu Reeves and Carrie-Anne Moss as Neo and Trinity, the iconic roles they made famous.’

The first full trailer for The Matrix Resurrections comes out Thursday, September 9 at 6am PST.

The original Matrix feature was released in 1999 and was met with much critical praise upon its debut. The feature was followed up by two further films, which were both released in 2003.

The Wachowskis, who directed all of the entries in the series, initially had no plans to continue the franchise after the third picture’s debut. However, rumors about a potential fourth film began to circulate in the early 2010s.

The Matrix Resurrections is set for a December 22 release.

Iconic: The original Matrix feature was released in 1999 and was met with much critical praise upon its debut (L-R) Joe Pantoliano, Laurence Fishburne, Keanu and Carrie-Anne Moss