The draw for the group stage takes place at the Grimaldi Forum in Monaco with the ceremony getting underway at 5pm this evening.
Liverpool, runners-up in the Champions League last season, will be in pot three in Thursday afternoon's group-stage draw after Benfica saw off Paok Thessaloniki in the play-offs.
Teams from the same nation can not face each other in the group stage, meaning Borussia Dortmund will avoid Bayern Munich, Schalke and Hoffenheim.
Manchester City now stand as favourites to win the tournament come June, at 5/1.
What pots are each team in?
Jurgen Klopp's Liverpool are undoubtedly the team to avoid from pot three, although there are plenty of other threats for the giants.
As the clock strikes 18:00 CET, the balls will be drawn out and the 32 teams participating in the competition will learn what fate has in store for them in the first step towards the Madrid showpiece. And Monaco may have lost even more of their star names, with Thomas Lemar and Fabinho the latest to depart, but they reached the semi-finals in 2016-17 under Leonardo Jardim.
Scottish champions Celtic miss out on Thursday's draw having been knocked out by AEK Athens in the third qualifying round earlier this month.
The worst outcome, arguably, on paper for Liverpool would be to draw Real Madrid, Borussia Dortmund and Inter Milan in their group.
What are the latest odds on the Champions League 2018-19 victor?