All eyes are on Belfast, as the Game of Thrones' casts and crew start filming the latest season of the hit TV series. Actor and activity sightings in the famous Game of Thrones filming location can be the very key in unlocking the possible storylines of Season 7.

Just recently, a very reliable source of Game of Thrones gossips and news, Watchers on the Wall, revealed that latest filming of the TV series focused on the Greyjoys in a great battle at sea.

As Theon and Yara Greyjoy team-up with the Mother of Dragons, the siblings' worst enemy and uncle-by-blood then teams up with the current Queen of Westeros. Yes, it looks like we will be seeing a very treacherous team in Euron Greyjoy and Queen Cersei in Season 7.

King Euron Greyjoy is said to have found a way to build new ships, forge an alliance with Cersei and catch up with Theon and Yara. The current King of the Iron islands is also said to be able to capture one of the Greyjoy siblings and even manage to silence a Sand Snake.  

The action-packed battle at sea is also confirmed by the recent injury of Gemma Whelan who plays as Yara Greyjoy in the Game of Thrones. The actress apparently hurt her back while filming and even had to be rushed to the hospital for checking.

Although, the Game of Thrones actress seem not to be suffering serious injuries as she's able to share to Instagram what she will be wearing in the hospital.