Preteens definitely need the experience of interacting in safe situations like the movie watching in your home. I do think it is appropriate provided that you are there. That means you approve the movie, you welcome the guests, you go in the room from time to time, and you -- along with your daughter -- bid them all good night at 9:30.
I encourage you to think about the 2 hours she spends on the phone every night with her friend (no matter what the gender). There are some boundaries here that I think are being violated. When is your daughter doing her homework, reading, interacting with the family, doing chores, seeing other friends, developing her own hobbies, etc.? Is this a family phone? Ten to 15 minutes at the most should be sufficient. I am supposing she sees this friend every day at school -- they can talk then.
If this is her own phone, I must admit to a personal prejudice: Why does a young teen need a personal line? Even with a personal line teen phone use needs to be monitored. That's the job we parents must take seriously to ensure our children's -- and our own -- safety.