Julia Roberts doesn't let her children watch her films.

The 44-year-old actress - who has seven-year-old twins Hazel and Phinnaeus and four-year-old Henry with husband Danny Moder - admits the family have "rigid" rules about movie screenings at home and will not be allowing them to see her turn as the evil queen in new Snow White film Mirror Mirror.

"I think they are too young considering the part that I play. We have a pretty rigid viewing feeling in our house. We'll find our right time that will be happy and joyous for us to share that all together, but it probably isn't in two weeks."

Instead, Julia prefers to have her youngsters reading with each other instead of watching the television: "Those nice, cozy, very short hours before bed, we just really spend together as a family talking and sharing the day and reading books, and really, before you know it, it's time for bed. Part of it is there's just not time for that. We would prefer something different in that time. We're more book people in our house."