<Li> Tim Roth as General Thade A sinister chimpanzee military commander who wants control over the ape civilization . Thade also intends to marry Ari, but she dismisses him . Roth turned down the role of Severus Snape in Harry Potter and the Philosopher's Stone because of his commitment to Planet of the Apes . Alan Rickman was eventually cast as Snape . Roth rewrote some scenes to give his character a more frightening presence . </Li> <Li> Helena Bonham Carter as Ari A female chimpanzee who protests the way humans are treated . She helps Leo lead the rebellion, and also develops a romantic attraction to him . </Li> <Li> Michael Clarke Duncan as Colonel Attar A gorilla military officer and Thade's closest associate and second - in - command . Djimon Hounsou had turned down the role because of scheduling conflicts with The Four Feathers . </Li> <Li> Estella Warren as Daena A female slave who, like Ari, develops a romantic attraction to Leo . </Li>

Who plays the gorilla attar in the 2001 movie planet of the apes