Naomi Watts has said she doesn't think she could have cosmetic surgery, because it would affect her ability to act and express emotion.
The 44-year-old actress - who was nominated for an Oscar this year for her role in The Impossible and who will be seen on screen as Princess Diana - told Good Health magazine she hasn't completely ruled out surgery, but she believes it would impinge on her work.
Naomi told the magazine: "Never say never - and I certainly don't judge anyone who does it. But most of the characters I play are going through some kind of emotional turmoil, so my job requires me to have expression.
"If my face was froze, what right do I have to play that part?
"All the women who haven't done anything to their faces are still able to play great roles. And some of the ones who have done something have messed it up - they look freakish.
"Anyway, for me it's about playing women with rich lives - and the longer the life, the deeper the wrinkles."
The star - who has two young sons, five-year-old Sasha and four-year-old Samuel with actor partner Liev Schreiber, also admitted she sometimes struggles with being a working mum.
"There's so much going on and [I'm] trying to balance being a mum with a career," she said. "It's great that I've got both things but there are times when it's a struggle. Sleep is often something I'm deprived of.
"But I feel so rich inside - I feel blessed to be a mother. For me, it's been a way of fulfilling a long-buried childhood dream. I had always wanted to be a mother but when I was desperately searching for work in LA after I moved there from Australia, any thoughts of family were very distant indeed and it seemed that it might never happen for me."