Awesome footage has emerged from Los Angeles, USA of a mum and dad surprising their youngest son with a puppy.

The video, filmed on August 10, shows the youngster getting overwhelmed and bursting into tears of happiness when he sees the adorable little dog for the first time.

According to the filmer, he's been feeling a bit lonely lately because he's the youngest of three brothers and the other two siblings are much older.

"With an already aging dog who doesn't like our son, we felt that this year was the year for him to get his best friend," his mum later wrote online.

"He was completely surprised and so were we when he displayed that level of emotion."

"The puppy is Gracie, she was a rescue and she was difficult to find," she continued.

Birthday puppy surprise overwhelms our 9 year old :)

With two parents and two older siblings, he was feeling like he needed a family "team member" of his own. He wanted a puppy really bad and had no idea he would actually get one.