Rambo fans should get ready for a fifth version of the famous action-movie series.

Sylvester Stallone, the star and writer of the four existing Rambo movies, indicated via Twitter on Sunday that he is either already making or is about to start work on a final installment - entitled Last Blood.

It will come more than 30 years after Stallone, 68, first took his Vietnam veteran to the jungle.

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Rambo's return: Sylvester Stallone posted to Twitter on Sunday to indicate that he would be making a new Rambo film, Rambo: Last Blood

A long time ago: Stallone's first Rambo film, First Blood, appeared back in 1982 and has been followed by three sequels

Stallone's vague statement on the newest Rambo film was phrased as an aside within a tweet about another movie.

'Doing Scarpa based on Gangster Greg Scarpa after LAST BLOOD RAMBO...' the actor posted to the social media site.

While Stallone gave neither details nor a possible release date for the film, rumours about Last Blood have circulated ever since the fourth Rambo film, simply titled Rambo, was released in 2008.

Money-makers: While all of the Rambo films have grossed over $100 million, the first sequel, Rambo: First Blood Part II, became the biggest success in 1985

The most recent official word and description came from the German movie company, Splendid Films, in June 2014.

'With Rambo V, Sylvester Stallone returns in his iconic role. This time he goes up against a Mexican cartel. Stallone... describes the new Rambo as his version of No Country For Old Men,' read a statement published by the Sydney Morning Herald.

This version of the fifth Rambo film was written by Stallone himself, although Conan The Barbarian writer Sean Hood was briefly attached as a screenwriter earlier in the development process.

Action stardom: The entire Rambo series (including Rambo III, above) has helped to define action movies over the past three decades

A 2013 announcement about a Rambo television series - without Stallone - has failed to materialize.

When it was released in 1982, the first Rambo movie, First Blood, was a huge commercial success despite ambivalent critical reviews.

That success led to three sequels, Rambo: First Blood Part II (1985), Rambo III (1988), and Rambo (2008).

Each movie has grossed over $100 million in worldwide ticket sales.

Possibilities: The fourth movie, Rambo, was released in 2008 - there have been multiple attempts to follow it with either a movie or a TV series since then

This potential revival of the Rambo movies came just as Stallone began production on an updated version of the Rocky movies: Creed, co-starring Michael B. Jordan.

Scheduled for a 2016 release, Creed is expected to feature an older Rocky Balboa training Apollo Creed's grandson (played by Jordan).

The above-mentioned Scarpa, as well as another sequel rumoured for The Expendables, could make for a very busy couple of years for Stallone.