How they qualified: On fire, figuratively. Topped a potentially tricky group ahead of Croatia, Serbia and Scotland, with eight wins, two draws and no losses. Can they carry that form into the finals?
World Cup pedigree: Solid but unspectacular. Reached the last four in 1986 but ran into Diego Maradona. That's their high point in 11 appearances at World Cup finals, and they missed out in 2006 and 2010.
Main man: Chelsea playmaker Eden Hazard has the talent to be ranked alongside superstars like Ronaldo and Messi, but is he ready to prove it in a World Cup?
One to watch: Ajax youth product Toby Alderweireld was a target for several Premier League clubs in the summer of 2013 before he chose to sign for Atletico Madrid. He's a cultured defender who can play at centre-back or full-back.
What are their chances? Many pundits will trot out the 'Dark horses' cliche but they're much better than that, potentially. Hazard, Lukaku, Dembele, Kompany, Mignolet, Witsel, Vertonghen, Vermaelen, Mirallas, Benteke, Chadli, Defour, Fellaini… very few of the other 31 competing nations can boast such a deeply impressive squad as Belgium's.