Today's draw, held in Nyon, Switzerland, will start at 11.45 CET, with ten teams allocated to the Champions Route and ten to the League Route.
There are five qualifier games in the 'Champions Route' - Celtic being one of the teams - that came through the third qualifying round.
Five other qualifier games are in the 'League Side' of the draw, where the likes of Arsenal, AC Milan, FC Schalke, Real Sociedad and FC Paços de Ferreira have all been registered.
Five in each section are seeded according to the club rankings established at the start of the season, and will be drawn against the other five. Balls containing the seeded teams will be placed in one bowl, with balls for the unseeded clubs positioned in another.
Champions League Draw
Dinamo Zagreb v FK Austria Vienna
Ludogorets v Basle
Plzen v Maribor
Shakhtyor Karaganda v Celtic
Steaua Bucuresti v Legia Warsaw
Lyon v Real Sociedad
Schalke 04 v FC Metalist Kharkiv
Pacos Ferreira v Zenit St Petersburg
PSV v AC Milan
Fenerbahce v Arsenal