Move over, Myrcella, there is going to be a new royal princess in King’s Landing. Lena Headey, the actress behind Queen Mother Cersei Lannister on “Game of Thrones,” recently revealed she’s expecting a baby girl.

Headey, 41, announced her pregnancy in February. The pregnant HBO star is keeping mum about the identity of the father, but she recently opened up about the sex of the baby.

“I am having a baby girl in six weeks,” she confirmed in a blog post on the Plan International USA site Wednesday. “You have all been so lovely in your messages to me, and I thank you for that.”

Headey’s big reveal was included in her guest blog post for Plan International USA, titled “My Daughter.” Plan works to “address the needs of children around the world,” focusing on “education, economic security, water and sanitation, health, sexual health (including HIV), emergencies, protection and child participation.” The actress used her big announcement as a way into a discussion about girls in developing countries who are not born with “the same rights and privileges” as those in developed nations.

In contrast, Headey wrote:

“My daughter will have freedom of choice. She will be free to dance, to sing, to be educated in the fields that spark her passion, to marry if she wants, to marry WHO she wants, to remain single, or to fall in love with another woman. She’ll be able to wear what she wants, put on lipstick, and read books that spark debate and expand her mind.”

Headey is already a mom to Wylie, 4, to whom she gave birth while married to musician Peter Loughran. The couple divorced in 2013, six years after being wed. Despite being a single mom, Headey told the Telegraph in 2014 that she wanted to have more children.

“My dream is to have more kids,” she said. “I love being a mum, and that’s been the hardest thing for me, trying to put to bed my desire to have more children. But there’s always adoption.”