The fifth season of "Game of Thrones" will be darker, according to actress Natalie Dormer.

The previous season of the world-renowned TV series was incredible from beginning to end. Fans saw plenty of deaths and gory scenes. These dark scenes define the TV series.  But just when viewers think that the show cannot get any darker, actress Natalie Dormer, who plays Margaery Tyrell, claims that it certainly will.

"Things are getting pretty dark and damp and dingy right now," Dormer spilled to E! Online.

She probably couldn't say more than that, since the filming of season five is already mid-way through, and the GoT team is quite strict about the secrecy and confidentiality of the production.

Dormer's remark had sparked speculations that it may pertain to her relationship with Cersei, played by Lena Headey. The two women are both ambitious and greedy for power since they both want to control the new king of Westeros, Tommen.

As seen in the fourth season, Margaery tried to befriend the 12-year old after the death of her husband, King Joffrey. There are speculations that she will try to marry the new king, but Cersei will get in the way, which could lead to an exciting face-off between the two of the most heinous women in the series.

Meanwhile, reports claim that nine new characters are set to join the cast of "Game of Thrones" season 5. The production team has not confirmed the roles that are rumored to appear next season.

One of the reported additions to the series is actor Alexander Siddig who will play the role of Doran Martell, Oberyn Martell's older brother and the ruler of Dorne. Oberyn was killed last season after siding with Tyrion Lannister in his trial and went into battle with The Mountain. Doran may be seeking revenge for the death of his brother.

The cast and crew are currently filming in Croatia and in other parts of Europe as "Game of Thrones" is due to come back on air in June 2015.