‘Game of Thrones’ continues to add to its cast as actress Essie Davis has been set to appear on the hit HBO series in the upcoming sixth season.

Davis will take on the role of a lead actress who works for a traveling theater company, as reported by Watchers on the Wall. Although there has been scarce information about her character, including her name, she is expected to be a “fun, charismatic, rum-drinking actress,” as revealed by the ‘Game of Thrones’ season six character descriptions earlier this year.

The ‘Matrix Revolutions’ actress was reportedly spotted on set by onlookers and HBO is yet to confirm the casting.

Other newcomers to be featured on ‘Game of Thrones’ season six include ‘Harry Potter’ actor Freddie Stroma as Dickon Tarly and Danish actor Pilou Asbaek as Euron Greyjoy. They will also be joined by ‘Doctor Who’ actor Richard E. Grant, who will reportedly portray the leader of the said troupe of traveling actors.

House Greyjoy and House Tarly will also play more important roles in the upcoming sixth season, thus the possibility that Grant could be portraying a member of either of the clans.

Other rumors have also been claiming that the ‘Downton Abbey’ actor could take on the role of Citadel archmaster Maester Marwyn or Lord Paxter Redwayne. Both characters have been featured in the book series but are yet to make their debut on the TV adaptation.

With the widely acclaimed HBO series gaining steam in dropping one scene after the other, author George R.R. Martin already admitted that he had once been worried about the show coming to an end first even before his own book series was finished.

However, later on, he realized that worrying would not put off such possibility.

"Worrying about it isn't going to change it one way or another. I still sit down at the typewriter, and I have to write the next scene and the next sentence,” the ‘A Song of Ice and Fire’ author shared. “I'm just going to tell my story, and they're telling their story and adapting my books, and we shall see."

Moreover, ‘Game of Thrones’ showrunners David Benioff and Dan Weiss also discussed their thoughts on the HBO program ending sooner than their published versions.

"Luckily, we've been talking about [the series outpacing the books] with George for a long time, ever since we saw this could happen, and we know where things are heading," Benioff explained. "And so we'll eventually, basically, meet up at pretty much the same place where George is going; there might be a few deviations along the route, but we're heading towards the same destination."

HBO’s ‘Game of Thrones’ season six is expected to air in April 2016.