Kate Hudson struggles to watch her new emotional film

In the film the actress plays Marley Corbett, a woman who finds out she is dying of cancer and then finds her ideal man.

But the 31-year-old revealed she found it hard to sit through the flick.

Speaking on a pre-recorded interview on ITV's Lorraine today, she said: 'It's a really bizarre thing to watch a movie you are in, for me it is strange to be critical when you're in something. But it got me big time, I had a hard time watching it.

'What I loved about this movie was how her cancer and her acceptance of her life and her death affects everybody else around her.'

Kate, who was raised by her Hollywood star mother Goldie Hawn and stepfather Kurt Russell, also revealed that she is in awe of her mum.

She added: 'I was always performing, you know. I was dancing and I was singing and I can't remember ever wanting to do anything else.

'She [Goldie] is just out of control. The other day we were walking and I thought, 'How is my mother thinner than me? You're thinner than me and you look better than I do. How is that possible? What's going on?'

'People always talk about their parents getting older but my mother is going to outlive all of us.'

Hudson, who is pregnant with Muse frontman Matt Bellamy's baby, added that her current pregnancy felt 'opposite' to when she had son Ryder, seven, with ex-husband Chris Robinson.