Milan and Lazio have been seeded in the Europa League group-stage draw, while Atalanta are in Pot 3.
The draw for the group phase will be held in Monaco on Friday at 12:00 BST (13.00 CET).
Lazio and Atalanta qualified by the virtue of finishing fifth and fourth in Serie A last season respectively, while Milan demolished Macedonian side Shkendija 7-0 on aggregate in the playoffs.
Milan and Lazio have been seeded in the Europa League group-stage draw, while Atalanta are in Pot 3.
The draw for the group phase will be held in Monaco on Friday at 12:00 BST (13.00 CET).
Lazio and Atalanta qualified by the virtue of finishing fifth and fourth in Serie A last season respectively, while Milan demolished Macedonian side Shkendija 7-0 on aggregate in the playoffs.
The Rossoneri last played in the Europa League groups nine years ago, in Carlo Ancelotti’s final season at the helm, and have never won the trophy, neither in its previous guise as the UEFA Cup.
Lazio, meanwhile, reached the last 16 two campaigns ago, while Atalanta made the quarter-finals of the 1991 UEFA Cup, losing to Italian rivals Inter.
The Dea also turned down an invitation to play in the now-defunct Inter-Toto Cup in 2001, which could have led to qualification for the UEFA Cup.
Pot 1
Zenit St Petersburg, Arsenal, Olympique Lyonnais, Dynamo Kiev, Villarreal, Athletic Bilbao, Lazio, Milan, Viktoria Plzen, Red Bull Salzburg, FC Kobenhavn, Braga
Pot 2
Steaua Bucharest, Ludogorets Razgrad, BATE Borisov, Everton, Young Boys, Olympique Marseille, Real Sociedad, Maccabi Tel-Aviv, Lokomotiv Moscow, Austria Vienna, Hertha Berlin, Nice
Pot 3
Astana, Partizan Belgrade, Hoffenheim, Koln, Rijeka, Vitoria Guimaraes, Atalanta, Zulte Waregem, Zorya Luhansk, Rosenborg, Sheriff Tiraspol, Hapoel Be’er Sheva
Pot 4
Apollon Limassol, İstanbul Başaksehir, Konyaspor, Vitesse, Slavia Prague, Red Star Belgrade, Skenderbeu, Zlin, AEK Athens, Lugano, Vardar, Ostersund