Spain has raised the minimum age for marriage from 14 to 16 years after the government also raised the age of consent from 13 to 16.
Before today, boys and girls could marry at the age of 14 with the permission of a judge.
365 marriages involving under-16s took place in Spain between 2000 and 2014, however in the 1990s, there were 2,678 marriages involving at least one under-16.
Today's ruling has been welcomed by Unicef and children's rights groups in Spain.
