Previously, Spain had required this age group to show proof of having received a full course of vaccination.
This sparked an outcry from British holidaymakers with teenage children, many of whom had not yet had the chance to receive both of their jabs.
Following the rule change, Spain’s Minister for Trade, Industry and Tourism, Reyes Maroto, said: “As one of the world’s favourite tourism destinations, we are committed to making travel to Spain a safe and easy experience for our visitors, especially for families travelling with children.
“We hope that with these changes, many families will choose Spain to enjoy safe and memorable holidays together.”
READ MORE: Cornwall tourists hit by huge price hike