Yes, you should always carry a valid government-issued photo ID when attending Halloween Horror Nights (HHN) at Universal Studios. While a standard theme park ticket doesn't always require an ID for entry, Universal implemented stricter age-verification policies in 2025 and 2026 to manage the intense nature of the event. Specifically, you must show a valid ID if you plan to purchase or consume alcohol, as the "Stay and Scream" and bar areas are strictly monitored. Additionally, if you are using an Annual Pass, a Florida Resident ticket, or a "RIP Tour" VIP experience, an ID is mandatory to verify your identity. Furthermore, Universal CityWalk often enforces a "curfew" during HHN nights where guests under 18 without a parent or guardian (who must be 21+ and have ID) are required to depart the premises after 8:00 PM, making a photo ID essential for all young adults.