"You’re also spending a lot of time alone with a child, without the company of another adult, which is hard for long periods of time," she continued.
"You maybe have doubts about your life: 'How did I get here?' It’s not all the time... but those moments creep in, and they creep in at weird times."
She went on to talk about her anxiety and the stresses of divorce, saying, "When you have a breakup of any kind, whether it’s amicable or not, you question a lot of the choices that you’ve made. 'OK, who am I now? And I had this new identity as a single mum, so what is that? How does this work?' Even the logistics of it, and the emotional cadence of it. 'How is this going to be?' And not knowing what the future holds. These are all things that trigger my anxiety.'
Thankfully, Johansson credits her daughter for motivating her to get through rough patches. "When I look at her, I feel full of hope and positivity. It’s good to wallow for a little bit. And then you have to pull yourself up," she said.
Marriage Story, which she stars in alongside Adam Driver, is out on Netflix on 6 December.