Their roar is a squeak and it's adorable.

The twin pandas born to Lun Lun at Zoo Atlanta on September 2 just turned one month old. Following Chinese tradition, the panda cubs won't be named until their 100th day.

Zoo veterinary teams say the twins, currently known as "Cub A" and "Cub B", each weigh more than two pounds and are on track developmentally. In just the past few weeks, they've started exhibiting the trademark black-and-white fur. Soon, they'll be opening their eyes and begin walking.

PHOTOS | Panda twins turn 1 month old

You can watch the cubs and their mother on the zoo's live camera.

The cubs will have their 100th day naming ceremony on December 12, and are expected to make their debut to Zoo Atlanta visitors in December or January.