Esme went through a good phase of always wanting to watch Secret Life of Pets. As soon as we hear there would be a second one, we knew it would be out first attempt in the theater with her. We waited until it had been out a few weeks, so there would be less people in the theater in case she got a little antsy (spoiler alert: she did.) We arrived without much time to spare before the main attraction, found our seat, and distributed snacks. She was much more exited about the idea of popcorn, but didn't eat any.
She stayed really engaged for the first 45 minutes or so, then started to wander. Luckily, there were only two others in our row and no one in front of us. She sat in a few other seats and went up and down the stairs many times. I apologized to the ladies in our row, but they said she did really great and wasn't a bother.
I'd call it a success overall. May need to attempt Frozen 2 this fall!