The Princess Diaries 1 & 2. I was forced to watch it with my girls, and it wasn't as hellish as it could have been. The sequel has a young pre-Kirk Chris Pine.
Ugh. I got drafted to watch one of those because my niece wanted me to watch it with her.
I did find it interesting how the fictional country portrayed in the film seemed to be heavily based on Monaco.
I am sure you have seen a lot worse movies Panzer and you probably made some good memories for your niece.
