Warning: Spoilers ahead for "Game of Thrones" season eight, episode five, "The Bells."

"Game of Thrones" season eight, episode five, "The Bells." Emilia Clarke has admitted she kept her character Daenerys Targaryen's plot twist a secret for two years.

In the penultimate episode of the show, Daenerys was transformed from the show's heroine into a "Mad Queen" who burned thousands of innocent citizens alive.

Clarke said over the past two years when fans would tell her they loved her character, she would think: "Well you're not going to love her for long!"

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Emilia Clarke has spoken of the difficulty she had keeping the dramatic fate of her "Game Of Thrones" character a secret for two years.

Fans were shocked this week when her character Daenerys Targaryen was transformed from the show's heroine into a "Mad Queen" who burned thousands of innocent citizens alive.

The 32-year-old admitted she was told about the storyline two years ago.

She also revealed that she has hired a room to watch the show's finale with friends when it is screened in the early hours on Monday.

Read more: 'Game of Thrones' fans can claim $130 in compensation if someone ruins the final episode with spoilers

At The National Multiple Sclerosis Society's Stop MS fundraising appeal in London on Thursday night, Clarke said: "People have always come up to me and told me how much they love Daenerys. And two years ago I got the script for this series and knew what was going to happen to her.

"Every time someone would come up to me and say, 'I love her!' inside, I was thinking, 'Well you're not going to love her for long!'

"It was so hard to keep it a secret. I would just nod and smile, and that's why I had this sort of furrowed-eyebrow expression a lot of the time. My eyebrows would sort of curl up."

Emilia Clarke. Jordan Strauss/AP

Despite record viewing figures, the reception to the final series of HBO's hit show has been mixed.

Critics said the season, which has only six episodes, has been rushed and a petition calling for it to be remade "with competent writers" has been signed by more than 700,000 disgruntled fans.

Clarke refused to be drawn on the controversy, saying: "The response in general to this series has been pretty overwhelming. It's been an incredible privilege to be part of."

"Game Of Thrones" was first broadcast in 2011. The final episode is on Sky Atlantic at 2 a.m. on Monday and will bring the sprawling fantasy epic to a close.

Read more: A mother who named her daughter after Khaleesi says she's 'in shock' after the 'Game of Thrones' character's big turning point

Clarke will be watching the finale with a big group of friends.

"I've hired out a room to host a screening and there's more than 40 people coming," she revealed. "We've had to get a load of bean bags in for the front row as so many people want to come."

Kit Harington, who plays Jon Snow, was due to co-host Thursday night's event but had to pull out, with insiders saying he had been summoned to a meeting with bosses at HBO. His wife Rose Leslie, who played Ygritte, did attend, however.

The event, held at Royal Horticultural Halls in Westminster, raised £355,000 through ticket sales and a silent auction.