Children under the age of 14 will now have to be accompanied by an adult in order to visit Disney theme parks, under new rules.
The new policy will come into effect from 23 March at all US Walt Disney World and Disneyland resorts and parks.
Disney spokeswoman Suzi Brown told NBC News: "If a cast member who is working at the front gates sees a guest who appears to be younger than 14 without someone who appears to be older than that, they will engage in a conversation with the guest."
As children that age do not generally carry identification with them, it will be up to the employee's discretion as to whether the child is deemed old enough to enter alone, she added.
Ms Brown said Disney chose the age of 14 after the company consulted organisations that dealt with child welfare, explaining: "That was the age they felt was appropriate. That's also the age the Red Cross recommends for babysitting."
She added that the move comes after a number of guests repeatedly asked if there is a minimum age, which the company previously did not have in place.
"This was a move to bring a consistent age policy across our domestic resorts," she said.
How to do Disney World Florida on a budget