Cate Blanchett insists ''consistency'' is key to perfect skin.

The 'Blue Jasmine' star knows moving from different film sets means she will always be subjected to different cosmetics, but she always strives to ensure the products she uses to wash and cleanse her face are the same.

Asked her ultimate beauty tip, she said: ''Find a good multi-vitamin. And for me it's also consistency.

''Being an actress, you have a lot of different products on your skin, and that's one thing for beauty, but for skincare, I find that the consistency has really paid off for me.''

And Cate says her persistence has paid off as it means she can skip some base products when she is short on time.

She told Marie Claire online: ''Working with really great make-up artists, I realised that they prime your skin like a canvas, and I'd never thought of that before. So the moisturiser you put underneath has to work with the foundation.

''I'm pretty time poor like everyone, so often I won't put the foundation on - I'll just prep the skin.''

The 44-year-old actress is a particular fan of SK-II's three-step LXP range as she finds them illuminating and hydrating.

She explained: ''All of the products have Pitera in them, which no other skincare line has. And it has illuminising properties, it feeds the roots of your skin, it's really hydrating and [great for] that dreaded thing, anti-ageing.''