Bath, Wasps and former champions Leinster have been drawn with holders Toulon in the pool stages for the 2015-16 European Rugby Champions Cup.
Premiership champions Saracens are alongside Ulster, Toulouse and competition debutants Oyonnax in Pool One.
The competition gets under way on the weekend of 14-15 November.
The final will take place at Lyon's new Grand Stade de Lyon, which is due to open later this year, on 14 May 2016.
Toulon beat Clermont Auvergne 24-18 in last month's final at Twickenham to complete a hat-trick of European titles.
Clermont will start their campaign in Pool Two with Ospreys, Exeter and Bordeaux.
Pro 12 champions Glasgow Warriors are in Pool Three alongside Northampton, Racing 92 and Scarlets while Stade Francais, Munster, Leicester and Treviso make up Pool Four.
European Rugby Champions Cup draw
POOL ONE: Saracens, Ulster, Toulouse, Oyonnax
POOL TWO: Clermont Auvergne, Ospreys, Exeter, Bordeaux
POOL THREE: Glasgow, Northampton, Racing 92, Scarlets
POOL FOUR: Stade Francais, Munster, Leicester, Treviso
POOL FIVE: Bath, Toulon, Leinster, Wasps