If a film is listed as Standby Only, you can join the Standby line at the venue to buy an unclaimed seat. Standby tickets are sold within 15 minutes of showtime on a first-come, first-served basis, so get in line early. Standby tickets are sold at full price and are not subject to discounts. Ticket package vouchers are not redeemable for Standby tickets.
If a film is listed as Selling Quickly, that means it’s close to reaching “Standby Only” status and you should probably buy yours ASAP!