<Ul> <Li> Jennifer Hudson as Young Nana </Li> </Ul> <Li> Jennifer Hudson as Young Nana </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>

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