The actress is currently promoting her new movie, ‘Divergent,’ as well as caring for her 4-month-old son Bear.
Speaking to the Telegraph about motherhood, she said: ‘I've done it before, and know exactly what to expect, particularly from this phase when they're so small. I am just really, really relaxed.’
The actress is also mum to 13-year-old daughter Mia and a 10-year-old son Joe.
Kate admits that she’s much more confident caring for a new born compared to when she had her first child in her 20s.
‘It's just lovely. When you're going through it for the first time, and I was only 25 when I had Mia, you are more anxious: 'Why are they upset, what do they need?' There are just lots more questions.’
‘But now it's like, 'They're only crying because they're tired. It's fine, they're hungry, it's fine!' You just kind of know a little bit more. It's more instinctive.’
Kate’s older children are doing their bit helping mum with the new baby.
The actress revealed: ‘I have no shortage of little helpers in Mia and Joe anyway.’
As Kate’s eldest child enters her teenage years, Kate admits that she thinks teenagers have a hard time, telling the newspaper: ‘I think the world is tough for teenagers.’
‘It's definitely tougher for parents of teenagers too, simply because we have to protect them from a lot more, I think, than perhaps when I was growing up.’
Kate says that there s ‘no right or wrong’ to parenting.
‘It changes all the time… There's no sort of magic wand that gets waved in order to do it. You just juggle and muddle and somehow make it work. We just do, because you just have to.’