Is it legal to be out this late?

On Thursday night, Me and best friend of mine will be going out to see a movie. The movie will be over late so we will be driving home past the curfew in his town. Im 18 years old, so I have no curfew. He,however, is only 17. If a cop happened to pull us over that night, will he get in trouble for being out late? I(a person of legal age) will be in the car with him, So i'm thinking that he will not be in trouble because there is someone of legal age in the car. Kinda of like a parent with their kids. What do you think? I don't think we will be pulled over because i'm a safe driver. But, Will he get in trouble for being out past curfew if we happened to be pulled over?