Keira Knightley banned social media in her home to protect her children from "unregulated spaces".
The 40-year-old actress - who has kids Edie, nine, and Delilah, five, with her husband James Righton - has opened up about her approach to internet usage and the need to monitor their online activity.
She told BBC Radio 4: "I find it very terrifying because they are unregulated spaces, and once children are in unregulated spaces, these are the ones I want to protect them from.
"So, in our house, we've got a no social media thing. They are not allowed on devices if we can't see what they are looking at, then they are not allowed on them.
"I don't know if that's right, you know. How long can I keep that going? I don't know!"
The Black Doves star revealed her "the parents mostly do the same