Heartwarming footage has emerged of a tired five-year-old boy being surprised by his parents with his first dog.

The video, filmed in South Carolina, USA earlier this week, captures the amazing moment he was surprised with a ten-week-old puppy after asking for a dog for more than year.

And there's a nice backstory to the surprise too.

"Earlier that week he overheard my wife and I discussing the financial expenses of owning a dog and he ran full speed into his bedroom, returned almost as quick and without hesitation dumped out his entire piggy bank of litterally half his life savings on the living room floor," the boy's father wrote online.