It features a baby fistpumping the air with a smug facial expression on his face.
The original image was taken by Laney Griner of her 11-month-old son Sammy, way back in 2007 - and it's still doing it's rounds on the internet today.
Some of the earliest versions of this photo to appear on the internet included a version with a Photoshopped background of a boy standing next to a broken sandcastle, crying. The title 'I hate sandcastles' was also added.
Since then, the meme has been used to depict situations where things turn out better than expected. It's sometimes used with a blue 'advice animals' background and sometimes with the beach background.
Success kid has even been featured in a Virgin advertising campaign.
Five years later, 'success kid' is going on for 5 years old.