'Game Of Thrones' Season 5 Spoilers: Will Lady Stoneheart Appear? Michelle Fairley Teases Cat's Fate

With all eyes now on "Game of Thrones" Season 5, any updates will be quickly devoured. That goes double for Lady Stoneheart rumors, and in a new interview with Entertainment Weekly, Michelle Fairley gives a definitive answer to the fate of this character.

WARNING: Full "Game of Thrones" Season 5 spoilers and "A Song of Ice and Fire" discussion ahead.

At the end of the "Game of Thrones" Season 4 finale, everyone was asking the same question. Will Lady Stoneheart appear? It turned out the vengeful zombie of Catelyn Stark did not show up in "The Children," leading to online frenzy over the character's fate and what will happen to her in Season 5.

There are plenty of reasons why Lady Stoneheart may not have appeared in the season finale as Michelle Fairley was busy shooting "24," and "The Children" had a lot of storylines to wrap up. As such, series creators David Benioff and D.B. Weiss could have held off on introducing Lady Stoneheart until "Game of Thrones" Season 5 as a way to add a familiar character for fans, especially since the next season will feature new characters and Dorne.

Final warning: Fairley's interview could be a huge spoiler for "Game of Thrones" fans and could have serious implications for the remaining George R.R. Martin novels.

In the Entertainment Weekly interview, Fairley said the character is "dead," not just figuratively but literally. "You respect the writers’ decision. I knew the arc, and that was it. They can’t stick to the books 100 percent," said Fairley.

If Lady Stoneheart will never appear in "Game of Thrones," what does it mean for the fate of the character in the "A Song of Ice and Fire" novels? At the end of "A Feast for Crows," Lady Stoneheart has captured Brienne and put her on trial. The undead Catelyn is about to hang Brienne, but the execution is halted when the Maid of Tarth says a word. In "A Dance With Dragons," Brienne reunites with Jaime, telling him he needs to go with her in order to rescue Sansa from the Hound. Their fate is unknown, as is Lady Stoneheart's.

If Lady Stoneheart is eliminated from the "Game of Thrones" TV series, that could tell us a lot about the future of the books. If Lady Stoneheart had an important role, say reuniting with Sansa, it would seem likely for the show to include the character. Her absence could mean she was not integral to the larger plot, as Benioff and Weiss have talked to Martin about the fate of the characters and the end of the series. That's a big spoiler for "A Song of Ice and Fire" and another way the "Game of Thrones" series could spoil the books.

Regardless of Lady Stoneheart's fate, fans will have to wait close to a year for "Game of Thrones" Season 5.