I think you're allowed no matter the age, as long as you have an adult. I'd personally wouldn't go younger than 13 though.
Have to be 17 with ID, or with someone 21 or older with their ID, they have to ittend the movie with you. No one under 12 is allowed in the last showing of rated R movies.
Under 17 no admission without a chaperone.
Thanks! Your answer is awaiting moderation.