The zoo will announce on its website and social media, when the chimp troop is ready to be visited by the public.
Visitor favourite – and now big sister – Chiku is also really excited about her new sibling. But curator of exotics Catherine Nichols said the troop had "jumped in" to keep her busy.
"Chiku is very inquisitive and has been hanging around mum on and off to get her attention, but big sister is giving her space to nurse. Grandma Lucy has been keeping an eye on Chiku and auntie Sally, uncle Lucifer and dad Luka have been amazing, playing with her and giving her lots of extra attention," Nichols says.
The International Union for the Conservation of Nature lists chimpanzees as endangered on their Red List of Threatened Species.
Hamilton Zoo supports the Jane Goodall Foundation and its work with chimpanzees.
The foundation is dedicated to protecting chimpanzees and conserving critical habitats while strengthening surrounding communities and empowering the next generation of conservation leaders.