Get a FREE Large Popcorn at AMC Theaters when you join AMC Stubs! As a member, you'll be eligible for exclusive rewards at any AMC Theatre. Insider Members will receive an offer for one free large popcorn during your birthday, while Premiere and A-List members will get one large popcorn and large fountain drink. Click here to join for free today. Your AMC Stubs birthday offer will be automatically loaded to your account at the beginning of your birthday month.