Indira Varma, the actress best known for her work on Rome, is joining the cast of Game of Thrones for its fourth season as Ellaria Sand.

In George R.R. Martin’s A Song of Ice and Fire series that the hit HBO series is based on, Ellaria is the paramour of Prince Oberyn “The Red Viper” Martell. The Red Viper, who will be played by Chilean actor Pedro Pascal, will bring along his mistress Ellaria to King Joffrey’s (Jack Gleason) wedding to Margaery Tyrell (Natalie Dormer) at King’s Landing.

In addition to her role on Rome, Varma has worked on a number of other TV series, including Luther, Human Target, Silk and Hunter. She’s currently filming UK drama series What Remains and has feature thriller film Mindscape in post-production.

Indira Varma in 'Rome'

Talking about the upcoming season of Game of Thrones at Comic Con, producers and cast stated their joint belief that it will be the show’s best one yet. “We got more action, which is obviously more time consuming,” said showrunner David Benioff. “It’s a brutal shooting season ahead. But if we can make it through, yeah, I think it’s going to surpass season three. The last 3 episodes, there’s so many scenes we’ve been waiting for so long to do. And it just gets more and more fun to write for these characters. After three years of doing it, we have that much more comfort to make everything uncomfortable for them. We’re very excited for it.”

Natalie Dormer and Jack Gleason as Margaery Tyrell and Joffrey Baratheon

Also joining the season four cast of the epic fantasy series is Sherlock and Doctor Who actor Mark Gatiss. It’s yet to be announced which character Gatiss will play, though it will likely be either the affable Tyrell patriarch Mace Tyrell or Wildling leader Magnar of Then.

The fourth season of Game of Thrones is rumored to begin airing in late March or early April of 2014 and will pick up roughly two-thirds of the way through the third novel in the best-selling book series.

– Chelsea Regan

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For More 'Game of Thrones' News:

Game Of Thrones News: Mark Gatiss Joins Cast For Season 4

HBO Tells George R.R. Martin To 'Get Busy Writing'

‘Game Of Thrones' News: Pedro Pascal Cast As ‘The Red Viper’

'Game Of Thrones' Season 4 To Begin Filming July, Rumored To Air Sometime Next Spring

George R. R. Martin Discusses 'Game Of Thrones' The Red Wedding, Robb Stark & Catelyn’s Deaths