The cute baby monkeys were born at the zoo recently and owner Yvonne Culell said the birth was quite a rare occasion.

"Three were born which is pretty unusual, and we were advised by the vet and species coordinator that one may not survive and unfortunately that is what happened. We lost one, but the other two are going really well," she said.

"Both parents are looking after them very well."

The babies were the first for the zoo's two pygmy marmoset residents, which have been in Halls Gap since July last year.

Churi, the babies' father, came from Barcelona, Spain to Australia as a juvenile with his parents 12 months ago and was imported to the Adelaide Zoo, before being allocated to come and live at Halls Gap by the species coordinator.

The mother, who is known as Inti, was born at Perth Zoo in February, 2008 and stayed with her parent group until a genetically suitable mate became available.

The new arrivals are expected to draw plenty of crowds to the Halls Gap Zoo over the coming months.

"They are a good attraction," Ms Culell said.

"The pygmy marmoset is the smallest in the monkey species, they are so tiny which is pretty special to see."

Ms Culell said zoo keepers were keeping a watchful eye on the baby marmosets from a distance, allowing the parents to form a bond with their offspring.

"We are monitoring them at the moment and when we think they are ready for human interaction we will organise a vet check to make sure they are healthy, and also check which sex they are," she said.

Halls Gap Zoo is currently keeping people slightly back from the marmosets' enclosure, but still offer plenty of room to catch a glimpse of the South American natives.

"We are currently keeping people back a little bit just to give them a chance to bond and settle in, but visitors can still see them and the reaction from the majority of the public has been aren't they tiny," Ms Culell said.

Pygmy marmosets are also known as the dwarf monkey because of their size, with body length ranging from 14 to 16 centimetres.