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.
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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.
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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."
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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?'"