On the My Disney Experience website, use the drop-down menu at the top to select "My Family & Friends". Select "update" next to the Guest whose age needs to be changed, and then enter their age and birthdate.

You cannot directly change the age of a person in your "Family & Friends" list through the My Disney Experience app or website once the profile is established and linked to active tickets or reservations. This is a security measure to prevent users from switching between "child" (ages 3-9) and "adult" (ages 10+) ticket categories to save money. If there is a genuine mistake—such as an incorrect birth year entered during setup—you will likely need to contact Disney's "Help Center" via phone or use the "Chat" feature in the app. A Cast Member can verify your identity and make the correction for you. If you are at the Walt Disney World Resort in person, a Guest Relations officer at the front of any theme park or at Disney Springs can also update the birthdate on the account. It is important to have these details correct, as age influences which Genie+ options are available, which tickets can be assigned, and how dining reservations are calculated. If a child has simply "aged up" from 9 to 10 since your last visit, the system typically prompts you to upgrade their ticket status rather than letting you manually edit the age field to keep them in the lower price bracket.