<Ul> <Li> Matthew McConaughey as Buster Moon, an optimistic koala who plans to save his theater from closure by holding a singing competition . </Li> <Li> Reese Witherspoon as Rosita, a pig who gave up her teenage music dreams to become a devoted wife to Norman, and mother to their 25 piglets . </Li> <Li> Seth MacFarlane as Mike, a white mouse with a big Frank Sinatra-esque voice and an arrogant attitude . </Li> <Li> Scarlett Johansson as Ash, a teenage porcupine punk rocker who takes part in an alternative - rock music duo with her boyfriend Lance . </Li> <Li> John C. Reilly as Eddie Noodleman, a sheep and Buster's friend who doubts the future of the theater . </Li> <Li> Taron Egerton as Johnny, a teenage gorilla who wants to sing, though his father would rather have him follow his criminal footsteps . </Li> <Li> Tori Kelly as Meena, a teenage elephant with an exquisite voice and severe stage fright . </Li> <Li> Jennifer Saunders as Nana Noodleman, a sheep and Eddie's grandmother who was a singer in her glory days . <Ul> <Li> Jennifer Hudson as Young Nana </Li> </Ul> </Li> <Li> Garth Jennings as Miss Crawly, an elderly iguana with a glass eye who is Buster's administrative assistant . </Li> <Li> Peter Serafinowicz as Big Daddy, a gorilla gang leader who wants his son Johnny to follow in his crime business . </Li> <Li> Nick Kroll as Gunter, a passionate dancing pig who is partnered with Rosita for the show . </Li> <Li> Beck Bennett as Lance, a porcupine and Ash's boyfriend . </Li> <Li> Jay Pharoah as Meena's grandfather who pressures her to overcome her stage fright . </Li> <Li> Nick Offerman as Norman, a pig and Rosita's husband . </Li> <Li> Leslie Jones as Meena's mother </Li> <Li> Rhea Perlman as Judith, a brown llama from the bank who warns Buster that his theater will be repossessed if he does not pay . </Li> <Li> Laraine Newman as Meena's grandmother </Li> <Li> Adam Buxton as Stan, a gorilla who is a member of Big Daddy's gang . </Li> <Li> Brad Morris as Baboon, whom Mike attacks for not donating more money to his street performances . </Li> <Li> Bill Farmer as News Reporter Dog, who documents Buster's singing competition . </Li> </Ul> <Li> Matthew McConaughey as Buster Moon, an optimistic koala who plans to save his theater from closure by holding a singing competition . </Li> <Li> Reese Witherspoon as Rosita, a pig who gave up her teenage music dreams to become a devoted wife to Norman, and mother to their 25 piglets . </Li> <Li> Seth MacFarlane as Mike, a white mouse with a big Frank Sinatra-esque voice and an arrogant attitude . </Li>

Who is the voice of rosita in sing