And then there were three.

In August, The Huffington Post UK introduced us to baby best friends Peggy the wombat and Anzac the kangaroo. "Hairless, quivering and outrageously cute," the delightful duo were reportedly taken in by the Wild About Wildlife Rescue Center in Victoria, Australia, after their mothers were suddenly killed.

Now, ZooBorns writes, another adorable creature has been added to the mix.

Meet Cupcake, the adorable 5-month-old baby wallaby, who, like her two new friends, lost her mom in a motor accident:

baby marsupials
(Photo Credit: Wild About Wildlife Rescue Center)

According to the animal news website, the three marsupials have become close chums:

The trio gets along splendidly, and Cupcake the Wallaby is particularly active these days. "When you are looking for her, you don't bother looking on the floor, you look up to see what piece of furniture she is about to launch herself from," reports Wild About Wildlife founder Alistair Brown.

The rescue organization estimates that Peggy the wombat and Anzac the kangaroo were 3 to 4 months old when they were taken in. Cupcake the wallaby, on the other hand, is estimated to be about 5 months old. The trio is expected to be released in the wild once the animals are old enough.

According to Animal Planet, many marsupials, including some species of wombat, are in danger of becoming extinct.

Marsupials native to Australia are under threat due to a variety of factors, including destruction of habitat and hunting.

According to Wild About Wildlife's website, there are only a handful of animal shelters in the Australian state of Victoria which have the facilities to take injured adult marsupials into care.

"As a direct result, most injured adult marsupials have to be shot or [euthanized], even if the injuries are of a relatively minor nature, due to the lack of alternatives. As urban spread of Melbourne continues steadily northwards, the need for this facility has never been greater," the website writes.

Baby marsupials, such as Caddy the wombat, have received a lot of attention in the media. In January, for instance, an adorable video of wombat babies playing at Australia's Healesville Sanctuary went viral on the Internet.

Look at photos of the trio here:

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  • Baby Marsupial Trio

    <a href="http://wildaboutwildlife.net.au/" target="_hplink">Baby Marsupial Trio</a>

  • Baby Marsupial Trio

    <a href="http://wildaboutwildlife.net.au/" target="_hplink">Baby Marsupial Trio</a>

  • Baby Marsupial Trio

    <a href="http://wildaboutwildlife.net.au/" target="_hplink">Baby Marsupial Trio</a>

  • Baby Marsupial Trio

    <a href="http://wildaboutwildlife.net.au/" target="_hplink">Baby Marsupial Trio</a>

  • Baby Marsupial Trio

    <a href="http://wildaboutwildlife.net.au/" target="_hplink">Baby Marsupial Trio</a>

Also on HuffPost:

For more on Peggy and Anzac, click through this slideshow of images taken earlier this year:
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  • Orphaned kangaroo joey and wombat joey who share a pouch at the Wild about Wildlife Kilmore Rescue Centre in Victoria, Australia, on 31 Jul 2012. (Photo credit: Rex)

  • Orphaned kangaroo joey and wombat joey who share a pouch at the Wild about Wildlife Kilmore Rescue Centre in Victoria, Australia, on 31 Jul 2012. (Photo credit: Rex)

  • Orphaned kangaroo joey and wombat joey who share a pouch at the Wild about Wildlife Kilmore Rescue Centre in Victoria, Australia, on 31 Jul 2012. (Photo credit: Rex)

  • Orphaned kangaroo joey and wombat joey who share a pouch at the Wild about Wildlife Kilmore Rescue Centre in Victoria, Australia, on 31 Jul 2012. (Photo credit: Rex)

  • Orphaned kangaroo joey and wombat joey who share a pouch at the Wild about Wildlife Kilmore Rescue Centre in Victoria, Australia, on 31 Jul 2012. (Photo credit: Rex)