<Li> Chelah Horsdal as Irena, a nurse who is looking after Charles . </Li> <Ul> <Li> Andy Serkis as Caesar, a common chimpanzee whose intelligence is increased from being exposed in the womb to ALZ - 112 when the drug is administered to his pregnant mother, and who is raised by Will for eight years . </Li> <Li> Karin Konoval as Maurice, a wise and benevolent Bornean orangutan who was retired from the circus and knows sign language; he becomes Caesar's closest ally . Konoval also cameos as the court clerk whom Will briefly argues with about his appeal . His name is a reference to Maurice Evans who portrays Dr. Zaius in the original Planet of the Apes . </Li> <Li> Terry Notary as Rocket, the dominant common chimpanzee at the ape sanctuary, until Caesar overthrows him . Notary also plays Bright Eyes, Caesar's mother, who was captured in Africa . "Bright Eyes" was the name given by chimpanzee scientist Zira to Taylor, the human astronaut in the Planet of the Apes movie . </Li> <Li> Richard Ridings as Buck, a Western lowland gorilla who pledges his allegiance to Caesar after he is freed by him . </Li> <Li> Devyn Dalton as Cornelia, a female common chimpanzee in the ape sanctuary . </Li> <Li> Jay Caputo as Alpha, the dominant male common chimpanzee of Bright Eyes' troop and Caesar's father . </Li> <Li> Christopher Gordon as Koba, a scarred and aggressive bonobo who has spent most of his life in laboratories and holds a grudge against humans . </Li> </Ul> <Li> Andy Serkis as Caesar, a common chimpanzee whose intelligence is increased from being exposed in the womb to ALZ - 112 when the drug is administered to his pregnant mother, and who is raised by Will for eight years . </Li> <Li> Karin Konoval as Maurice, a wise and benevolent Bornean orangutan who was retired from the circus and knows sign language; he becomes Caesar's closest ally . Konoval also cameos as the court clerk whom Will briefly argues with about his appeal . His name is a reference to Maurice Evans who portrays Dr. Zaius in the original Planet of the Apes . </Li>

Who plays caesar in the planet of the ape movies