While filming the first season of "Game of Thrones" in 2010, Lena Headey just felt off, but it had nothing to do with the script.
At the time, she had just given birth to her first child, her son Wylie.
"I was postnatally depressed but I didn't know it," she told The Edit. "I saw a doctor for the medical check, and I just burst into tears. She said I was postnatally depressed and I went, 'Am I? Why is that?' I saw a great guy and he sorted me out, but I did the first year [on 'Game of Thrones'] in that space, figuring out motherhood and going through a weird time personally. It was tricky."
Doing some of the scenes, she said, was "really horrendous."
Lena has spoken about her depression before. In a 2014 interview with The Telegraph, the actress said she's batted symptoms of depression since she was 15 years old.
"Then I had postnatal depression, which I didn't realize for a long time," she said. "I went a bit nuts and eventually went to a guy who mixes Western and Eastern philosophy in terms of medicine and he put me on a course of something that changed everything. But I would never want to be dependent [on medication]."
In July 2015, Lena gave birth to daughter Teddy.
She joked in 2014 that being an actress and a mom are two vastly different things.
"I come home to a four-year-old. I get a black eye and he'll tell me he doesn't want that old macaroni cheese," she said. "It's like living a double life."
Although she wouldn't trade it for the world, she said that she still finds motherhood exhausting.
"It's one of life's mysteries how they go non-stop 15 hours a day. I'm so tired at the end of the day that we read a book and go to sleep together. We sleep in the same bed. [At first] I fought him over it, then I thought, 'I'm going to choose my battles. If it makes him feel happier, sleeping in the same bed is not a big deal,'" she said. "He usually ends up lying on my head, but I love waking up with him because, guaranteed, the first thing out of his mouth will make me laugh. Usually it's, 'Mummy, I farted – can you smell it?'"