Natalie Dormer has been cast as Irene Adler in Elementary.

CBS announced that Dormer will appear in a three episode arc to wrap the first season.

The character was supposedly murdered by the hands of Moriarty, leading to Sherlock’s drug addiction.

“We’re moving to the next chapter in our show — and in some ways, to a previous chapter in Holmes’ story,” executive producer and creator Rob Doherty said in a statement. “Irene Adler is perhaps the most pivotal relationship in Sherlock’s life, and I can’t think of an actress better suited to the challenge than Natalie.”

Dormer currently stars as Margaery Tyrell in Game of Thrones.