Former Terminator star Linda Hamilton is set to rejoin the sci-fi franchise, director James Cameron has confirmed.

The actress will reunite with the series' original lead Arnold Schwarzenegger for the sixth film in the hugely successful sci-fi series.

Hamilton played John Connors' mother Sarah Connor in the first two Terminator films in 1984 and 1991, co-starring alongside original Terminator actor Schwarzenegger.

The franchise is being revived by its creator Cameron for a sixth instalment, which will follow 2015's critically-mauled Terminator Genisys.

Cameron will produce the new movie while Deadpool's Tim Miller will take the director role, with the film expected to start shooting in March 2018.

The Hollywood Reporter says that Cameron confirmed the news of Hamilton's return at a private event earlier this week.

"As meaningful as she was to gender and action stars everywhere back then, it’s going to make a huge statement to have that seasoned warrior that she’s become return," he said.

"There are 50-year-old, 60-year-old guys out there killing bad guys," he continued. "But there isn’t an example of that for women."

The new movie is being treated as a sequel to the Cameron-directed Terminator 2: Judgement Day.