The 37-year-old said that putting on a little bit of weight can help banish the gaunt look as you get older.
She told Self magazine: 'The ultimate beauty secret for a woman getting older is, 'Don't be too thin!' It is always better to have a little meat on your bones. When you are just muscle, you end up being gaunt in the face, and that makes you look older by five or 10 years.'
She added: 'I don't think of getting older as looking better or worse; it's just different. You change, and that’s OK. Life is about change. I don't have anxiety about it, so I'm not running to get Botox. 'Maybe that will change, but I don't think so. I feel comfortable in my skin and comfortable with ageing, so I think it's OK that I get wrinkles.'