United Kingdom, Nov. 1 -- Keira Knightley won't allow her daughters to use social media until they are 16.

The 40-year-old actress - who has Edie, nine, and Delilah, five - is reluctant to allow her daughters to use social media, but she admits that she's not entirely sure whether it's the best approach or not, either.

The movie star told The Independent: "At the moment, they're not allowed on any of it, which ... I don't know if that's right.

"If we can hold out until they're 16, then I will desperately try and do that. I've no idea if that's the right thing to do, or if we'll succeed in doing that."

Keira has often been paid less than her male counterparts. However, the actress also feels she's been "lucky" throughout her career.

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