There is not a lot cuter than a baby and their beloved furry friend hanging out together.
Particularly when the baby is crawling around in a onesie and the dog is a large, protective Great Dane puppy with oversized paws.
A video of a pup preventing his baby friend from climbing the stairs is melting hearts all over the internet.
The adorable clip, which was originally posted to TikTok by Hannah Searfoss, features a shiny black Great Dane called Lisa perched on a stair case using her body as a canine baby gate.
"Lisa the Nanny Dog. Time to put up a gate!", Hannah captioned on the clip. "She was worried about him climbing the stairs."
Lisa, who is only five-months-old, balances awkwardly on the first step, blocking her little chum Elliot to ensure he stays safe.
In one heart-warming moment, she even pushes out a concerned paw until Elliot reluctantly crawls off in the other direction.
The video quickly went viral, amassing more than 12.9 million views and being re-shared to Twitter.
"Dogs are so smart. Around little babies they always protect them like their own babies," said one.
"Such a great dog. Keeping his little human safe!", commented another.
Mum and owner Hannah posts regular videos of the gorgeous pair, describing them as best friends.
"These two are always together, just like peas and carrots," she captioned another clip of the siblings goofing around together.
So. Damn. Cute.
What a special bond.
Photo: Lisa is very protective of baby Elliot. TikTok @hsearfoss