Sienna Miller has always followed her instincts in life, but admits she’s not open to insecurities. In a recent interview with Vogue, she opened up about her pregnancy, her romance with Oli Green, moving to London and her film project “Horizon: An American Saga,” which Kevin Costner is directing and producing.

Miller, who is already mother to Marlow, is set to become a mother for the second time, announcing her pregnancy with partner Oli Green. Although her life was once more “vulnerable” to the pressures and pace, now her schedule even allows for morning yoga. “I like to leave things open,” Miller said, adding that she doesn’t do well with a set lifestyle.

As she talked about the “demons of motherhood,” she referred to her preparation for Marlow’s birth and the pressure she put on herself. “I spent a lot of time preparing for the birth, and I hadn’t thought at all about what would happen when I came home with a baby. Now I know,” she noted.

Revealing the “demons of new motherhood,” she addressed her decision to give birth naturally.

“It was so important in my mind to do it ‘right’. But in hindsight, I know it was just the demons of new motherhood,” she revealed. Now, she stressed that she won’t put the same pressure on herself.

In her interview, Miller opened up about life, stressing that while she’s driven by her instincts, she’s not “immune” to her insecurities. “I really want to get to a point where I don’t feel the need to make fun of being older and having a baby,” she said.