The Revolutionary Road actress also laid into the notion of women having to lose weight after giving birth.

"There’s a big part of me – now, more than ever before – that feels a sense of responsibility for how other women view themselves," she said.

"Take having the baby, for instance," she continued, in reference to her youngest son Bear, who has just turned one.

"Have I actively been on a diet to lose my baby weight? No, I haven’t. I genuinely bloody haven’t. I so didn’t want to be one of those ‘Oh, wow, she’s back in shape after 12 weeks’ women. When I read things like that, I just think, ‘Oh, for f***’s sake, that’s actually impossible.

"Life is just too short to be spending time focusing on things like that. I want to keep my health and my sanity and be well fed and happy. I was nowhere near my pre-pregnancy shape when Bear was 12 weeks old – I was breastfeeding, apart from anything else, and hungry all the time – and nor would I have wanted to be.

"And, do you know what? My body will never go back to what it was, and I wouldn’t expect it to after three babies."

'I wouldn't change a thing'; Kate Winslet on her two divorces and why life's too short for post-baby dieting