A 2-1 victory over Fiorentina on Saturday sealed the Scudetto for Massimiliano Allegri's men for the eighth time on the bounce.
Alex Sandro's effort and German Pezzella's own goal handed the hosts the title with five matches to spare in the Italian top-flight as they currently hold a 20-point gap above second-placed Napoli.
Benatia who left the Turin outfit for Qatar top-flight side Al-Duhail in January has joined the club in celebrating the historic 35th league title.
"Congratulations to Juventus for this 8th title. A thought to all the friends I have in this team," Benatia tweeted.
The Atlas Lions are placed in Group D of the foremost continental competition alongside Cote d'Ivoire, South Africa and Namibia.