Walt Disney World sent a reminder out on Monday alerting guests that due to the high demand during the holiday season, theme park reservations for Disneyland and Walt Disney World theme parks are quickly filling up or are already filled on select dates or parks.

For a same-day reservation to a Disney theme park, guests are required to have a valid park ticket and a Park Pass reservation for the park they wish to visit that day. Guests are able to check for current park availability on their desired visitation dates on the official Walt Disney World website and are encouraged to do so before they purchase tickets.

Guests who have already purchased their park tickets should book Disney Park Pass theme park reservations as soon as possible to secure their visit to the parks.