And these amazing images show the moment little joey pops her head out of her mum's pouch for the first time.
Staff at Symbio Wildlife Park, in Sydney, Australia, saw Lilly's belly was wobbling and they grabbed a camera.
Incredibly, they managed to capture the very moment the swamp wallaby's baby first emerged from her pouch.
And it is adorable!
They posted the heart-warming video on the Wildlife Park's Facebook page.
The joey peeks out of her mum's tummy, has a little look around but quickly pops back in.
What a cutie!
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