Game of Thrones season 7 spoiler: Cersei star reveals 'LOATHSOME' storyline for THIS character
The evil queen – played by Lena – hasn't been on the Iron Throne for long, but is already saying that one of her rivals is in for a tough time when the HBO hit show returns.
The 43-year-old told Maisie Williams, who plays little Arya Stark, about her favourite scene before dropping a major spoiler for upcoming episodes, saying: "I think the highlight was [last season] when she blew up the Great Sept of Baelor, then just enjoyed her wine.
"And this season coming because she's lost everything.
"Whatever was good [in her life] has been erased and she's a horrible cow to one particular character…
Will Cersei turn on her brother Jamie?
Will Cersei make it to season eight or will se meet her end?
It's really quite loathsome
"It's really quite loathsome," Lena teased to Net-A-Porter magazine.
Whilst it is currently unknown who the chosen character will be at the mercy of Cersei, odds are on for the queen getting angry at her family.
Although he is her brother, Jamie (Nikolai Coster-Waldau) is widely thought to be the "queen-slayer" or "Vanlonqar" set to put an end to Cersei.
Game Of Thrones stars as kids Fri, June 30, 2017
Game Of Thrones: Childhood photos of the GOT cast when they were kids.
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Maisie Williams looks adorable with her hair in bunches in a cute throwback snap
Will he try to fulfil his fan-created prophecy and fail leaving Cersei desperate for revenge?
This comes after Lena teased that her alter-ego's days are numbered, saying there is "not a chance in hell" that Cersei will last much longer on the show.
Game of Thrones returns to HBO on July 16 and will be simulcast in the UK at 2am on Sky Atlantic.