Nine-month old king penguin, Pesto, has gained international fame after going viral on social media for his big size, weighing in at a whopping 21 kilograms.

Education supervisor at Melbourne Aquarium, Jacinta Early, then provided an updated weight on 3AW Drive, with Pesto now weighing in at 22.5 kilograms!

“He’s living a pretty good life, he thinks he’s pretty special with all of this attention he’s definitely getting,” Ms Early told Jacqui Felgate.

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Images: Instagram/SEA LIFE Melbourne Aquarium