How many Englishmen to represent their country while a Boro player can you name?
One of them, Gareth Southgate, is set to name his squad for the upcoming European Championships tomorrow, with England then to play two friendlies at the Riverside next week.
There are a total of 30 Lions to have played for their nation while on Boro's books. How many of them can you recall?
Take our quiz below to find out - and afterwards have a look at the gallery above to see some of those players in international action.