18.4mln viewers make 'Game Of Thrones' HBO's most-watched series

George R.R. Martin's fantasy series 'Games Of Thrones' has become HBO's most-watched TV show with around 18.4 million viewers per episode.

According to Deadline.com, the award-winning series beat 'The Sopranos' 2002 season's record which has claimed 18.2 million viewers on an average per episode.

The 4th season of the show, which is based on the 'A Song of Fire and Ice' novels, is currently airing, and has only two episodes remaining, while HBO has already renewed contract for the show's fifth and sixth season.