The 36 teams competing in the league phase have now been finalised, following the completion of the Conference League and Europa League play-off rounds on Thursday evening.
UEFA have now confirmed Palace will be in pot 2 for the draw. Each side will be drawn to play six opponents, one from each pot.
Each side involved can play against a maximum of two opponents from any other one association.
The draw ceremony begins at 12:00 BST, although the Conference League draw will follow the Europa League draw. Rather than done by the drawing of numbers, the draw is executed fully digitally, through a designated automated software, reviewed and checked by an appointed external auditor.
Here are the seedings below:
Participants
Pot 1
1. Fiorentina (ITA)
2. AZ Alkmaar (NED)
3. FC Shakhtar Donetsk (UKR)
4. ŠK Slovan Bratislava (SVK)
5. SK Rapid (AUT)
6. Legia Warszawa (POL)
Pot 2
7. AC Sparta Praha (CZE)
8. FC Dynamo Kyiv (UKR)
9. Crystal Palace FC (ENG)
10. KKS Lech Poznań (POL)
11. Rayo Vallecano de Madrid (ESP)
12. Shamrock Rovers FC (IRL)
Pot 3
13. Omonoia FC (CYP)
14. 1. FSV Mainz 05 (GER)
15. Racing Club de Strasbourg Alsace (FRA)
16. Jagiellonia Białystok (POL)
17. NK Celje (SLO)
18. HNK Rijeka (CRO)
Pot 4
19. HŠK Zrinjski Mostar (ΒΙΗ)
20. Lincoln Red Imps FC (GIB)
21. KuPS Kuopio (FIN)
22. AEK Athens FC (GRE)
23. Aberdeen FC (SCO)
24. FC Drita (KOS)
Pot 5
25. Breiðablik (ISL)
26. SK Sigma Olomouc (CZE)
27. Samsunspor FC (TUR)
28. Raków Częstochowa (POL)
29. AEK Larnaca FC (CYP)
30. KF Shkëndija (MKD)
Pot 6
31. BK Häcken (SWE)
32. FC Lausanne-Sport (SUI)
33. Universitatea Craiova (ROU)
34. Hamrun Spartans F.C. (MLT)
35. FC Noah (ARM)
36. Shelbourne FC (IRL)
League phase matches will take place on the following dates:
- Matchday 1: Thursday, 2nd October
- Matchday 2: Thursday, 23rd October
- Matchday 3: Thursday, 6th November
- Matchday 4: Thursday, 27th November
- Matchday 5: Thursday, 11th December
- Matchday 6: Thursday, 18th December