Bright Eyes is given her "fizzy drink" in a Gatorade bottle because, during the research for the film, Director Rupert Wyatt learned that captive chimpanzees love sugar, and Gatorade is one of their favorite drinks.
The doors to the cages of the ape facility were removed for all performance capture shots because it was difficult to animate through them. The apes were then animated into the scene, and digital doors and mesh were inserted over them.
Andy Serkis improvised the moment where Caesar gets in the back seat instead of the hatchback of the Jeep.
One of the first movies to use motion-capture in an on-location setting. Previously, motion-capture was limited to special studio set-up with special motion-capture cameras in very clearly defined surroundings.
All the apes seen are 100% computer-generated, including the apes in the opening scene during the capture of Bright Eyes. This chase sequence was meant to echo the original Planet of the Apes, when the apes are seen hunting the humans.
Karin Konoval: The stubborn court clerk that gave Will a hard time about filing for his appeal was played by Karin Konoval, who also played Maurice the orangutan. Director Rupert Wyatt brought her back after her ape performance capture to play a human because he liked her so much.
Terry Notary: The actor who plays Caesar's mother Bright Eyes and the former dominant chimpanzee Rocket also has an uncredited cameo as one of the gorillas on the Golden Gate Bridge action sequence.