After Game of Thrones Prequel's on-set photos emerges online, a snap featuring the show's cast surfaces. The spinoff series' pilot has wrapped up filming, but it has yet to be seen if it will turn to be a full-blown show.

Sheila Atim, Georgie Henley, and Marquis Rodriguez have been hanging out together after the show's production. The three, along with three other people, seem to be in the room, enjoying a small talk while seating on a bed behind the scenes.

However, other Game of Thrones Prequel stars are not seen in the picture. Naomi Watts, John Simm, Miranda Richardson, John Heffernan, and Jamie Campbell Bower are reported will also be featured in the series.

In an interview with NET-A-PORTER's digital magazine, of PorterEdit, Watts admitted she didn't know a thing about Game of Thrones. "I didn't start watching until I was approached about this job," she said.

But as her brother, photographer Ben Watts, is an avid fan of Game of Thrones, he told him she should never turn it down. Watts then had a television marathon for three months and "was in-hook, line, and sinker."

Watts knows being on Game of Thrones Prequel will boost her public profile. But, she still has fears of being a part of the show and doesn't even know what to prepare for.

HBO announced Watts would be playing the role of a "charismatic socialite hiding a dark secret." However, the specific roles they are going to play remain under wraps. The prequel is said to take place thousands of years before the events of the original series.

It remains to be seen if Game of Thrones Prequel, with a tentative title Bloodmoon, will materialize to be a real show. The pilot is only designed to test the water if it deserves to be a full-blown series. The show is written by the screenwriter Jane Goldman and the main brain behind A Song of Ice and Fire, the novel series that inspired the show, George R.R. Martin himself.

The spinoff will chronicle from the time of the Golden Age of Heroes to its darkest hours, per Metro News. It will reveal the horrifying secrets of the history of Westeros, the true origins of the White Walkers, the mysteries of the East, and the Starks of legend. It is the story that nobody knows about.

Martin earlier revealed the new show would have a connection to the Game of Thrones, but it won't feature House Lannister. However, the Starks may be hanging around. Game of Thrones Prequel may be out either in 2020 or 2021 on HBO.