Manchester United and Bayern Munich have been pitted together in today's Champions League group draw.
Newcastle United, meanwhile, will play Paris St-Germain, Borussia Dortmund and AC Milan in their group. While Napoli and Real Madrid have been paired together.
Holders Manchester City are in the same group as RB Leipzig.
Group stage draw in full:
Group A: Bayern Munich, Manchester United, FC Copenhagen, Galatasaray
Group B: Sevilla, Arsenal, PSV Eindhoven, RC Lens
Group C: Napoli, Real Madrid, Braga, Union Berlin
Group D: Benfica, Inter Milan, Salzburg, Real Sociedad
Group E: Feyenoord, Atletico Madrid, Lazio, Celtic
Group F: Paris St-Germain, Borussia Dortmund, AC Milan, Newcastle
Group G: Manchester City, RB Leipzig, Red Star Belgrade, Young Boys
Group H: Barcelona, Porto, Shakhtar Donetsk, Royal Antwerp
The group stages will run from 19 September to 13 December, with the final at Wembley on 1 June.