Between raising her three-year-old daughter Marlowe and juggling her career successes, having starred in Oscar-nominated film American Sniper and crime-drama Foxcatcher, Sienna Miller has had a busy 12 months.

“It's been really quite overwhelming recently, just with the volume of everything going on,” the actress says in the October issue of British Vogue. She explains how she's learnt that a desired work life balance is not necessarily achievable.

“Everything is shifting. It's actually been the shittiest year, and amazing. It's always yin and yang. I feel like if you're excelling in one area, it's hard to manage both and I do feel like the work is going really well.

“Obviously when you have a baby it's the most incredible experience but your life is also catapulted into this chaos and you are exhausted. I could literally get on this table and fall asleep,” she continues.

“I'd like to be better at managing things; I'd like to be more super - although we're never going to feel it, even if we are. That's the curse of motherhood - we just run ourselves ragged. I'm just trying to get a sense of what that guilt is. I sometimes feel like it's a totally invented emotion. It's strange to be punishing ourselves this way. It's not healthy.”

“We just run ourselves ragged” Sienna Miller on “the curse of motherhood” and sisterhood