Emma Stone uses grapeseed oil instead of moisturiser.

'The Amazing Spider-Man' actress claims she is allergic to "almost everything" when it comes to her sensitive skin, but uses the cheap vegetable oil to stay looking fresh and blemish free.

She told Style.com: "I just use natural grapeseed oil from the grocery store on my face as moisturiser.

"After the shower, I pat it on, and then I'll use it throughout the day and at night."

There is one side effect of her beauty secret though, as she added: "I pretty much smell like grape all the time."

The actress - who has appeared in comedy roles for films such as 'Superbad' and 'Easy A' - has previously said she is not particularly vain, and doesn't always want to be sexy.

She said: "I think a lot of female actors have a real fear of not looking their best. They learn to prize their vanity over a role in which they have to look like a moron.

"They're worried they'll damage their sex appeal. Thankfully, I have no problem looking like a moron!"