Koko is a world-famous gorilla that lives at the San Francisco Zoo.

She has a sign-language vocabulary of more than 1,000 words.

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The gorilla also loves babies. So, for her 44th birthday over the summer, caregivers at the Gorilla Foundation arranged for Koko to spend some time with a box full of kittens.

She seemed to love every second of it.

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Koko’s caretaker immediately knew Koko and the kittens had to be together.

So Koko was able to adopt two of them. Her caretaker posted a video of the gorilla and her new “babies” to YouTube, where it has been viewed more than 1.4 million times.

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Kittens have been around Koko before. She’s adopted multiple kittens throughout the years, nurturing them as if they were her own babies.