For the 2019/20 season, 213 clubs from the 55 UEFA member associations will take part in the competition, including Wolves, after our seventh finish in last season's Premier League.
Nuno Espirito Santo's side will find out which teams they could be facing in their first match back in major European competition for 40 years from 12pm today.
But do you think you can name which countries the following 20 clubs represent from four multiple choice options? Take our latest Wolves Trivia quiz and let us know how you fared #WolvesTrivia.