Didn't want to pay for Foxtel and you've been pirating the latest season of Game of Thrones?

Watch out – HBO is on your case.

In a mammoth effort to stem piracy, the studio behind the wildly popular series is sending warning letters to alleged copyright infringers, urging them to pay to watch the show instead.

It has also sent take-down requests to torrent sharing sites to try to stem the flow of pirated content at the source, according to Torrentfreak.