Parents need to know that Sing 2 is the sequel to 2016's popular animated musical comedy Sing. Matthew McConaughey returns as the voice of Buster Moon, the starry-eyed koala theater director who, this time around, tries to stage a show at the glamorous Crystal Theater. But it will only work if he can convince the biggest pop star in the world (Bono, in his animation debut) to come out of retirement. Characters use some insult words ("stupid," "loser," etc.), there are moments of slapstick action, and a couple of scenes are violent/scary, like when a main character is nearly thrown off a balcony and later is actually pushed off a ledge (but saved at the last minute). A few conversations involve a supporting character's grief over the loss of his dead wife. A married couple kiss and embrace briefly, and two different characters flirt with love interests. Like the original, the sequel features dozens of hit classic and contemporary songs and has themes of teamwork, perseverance, and following your dreams. Most of the original cast members reprise their roles, including Reese Witherspoon, Nick Kroll, Scarlett Johansson, Tori Kelly, and Taron Egerton. New additions Bobby Cannavale, Pharrell Williams, Halsey, Eric André, and Chelsea Peretti help round out the cast.