While HBO is drawing its Game of Thrones television series to a close, the fantasy saga is set to live on in the form of multiple spin-offs.

As the show - the most watched series in HBO's history - approaches its penultimate season, rumours of spin-offs have run rife.

According to Variety, HBO has confirmed it has closed deals with four different writers to explore possible spin-offs of the hit drama, which is based on a book series by George R.R. Martin.

No timeline is yet in place for the development of the projects.

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Davos Seaworth (Liam Cunningham) in Game of Thrones season 6. Photo / Supplied
Davos Seaworth (Liam Cunningham) in Game of Thrones season 6. Photo / Supplied

"We'll take as much or as little time as the writers need and, as with all our development, we will evaluate what we have when the scripts are in," a spokesperson said, according to Variety.

The four writers are reported to be Max Borenstein (Kong: Skull Island), Jane Goldman (Kingsman: The Golden Circle), Brian Helgeland (Legend), and Carly Wray (Mad Men, The Leftovers).

It's understood Goldman and Wray will each be working individually with novelist and Game of Thrones creator George R.R. Martin.

Season 7 is set to premiere on HBO on July 16 and conclude on August 27.