This is the heartwarming moment a dog from Port Alegre in Brazil mimicked his owner's facial expression.

In a charming video, the dog's owner changes his facial expression only to be mimicked by his faithful friend.

As the owner lets out an exaggerated yawn, the dog follows immediately.

Then when the owner smiles, the dog again smiles.

Unfortunately, the video is only 16 seconds long as internet fans could spend hours watching the hilarious scenes.

This is the amazing video where a dog mimics his owner's facial expressions

When the owner smiles, the dog quickly follows with a cheeky looking grin, pictured