US TV network HBO has signed a deal with novelist George RR Martin and four scriptwriters.
The new Game of Thrones shows will explore different time periods of the “vast and rich universe” created by George RR Martin in the A Song Of Ice And Fire fantasy books.
HBO hasn’t set a deadline for the projects.
There’s still one more season of the main series to film before the spin-offs can start.
According to broadcasters, the coming series promises a “brutal, bloody and wintry return to Westeros”.
It’s the latest the show has aired, with all other seasons beginning in March or April.
Bosses deliberately delayed filming series seven because they needed more “wintry conditions”.