The little white bear lives at Toronto Zoo in Canada and staff weren't going to let his milestone day pass without a treat.
Surprising Humphrey, they placed a giant frozen birthday cake in his enclosure - and he couldn't wait to get stuck in to the three-tiered creation.
Luckily for us, photographers were on hand to capture the moment the polar bear began gnawing away on his special surprise.
It's a good job he didn't have a candle really, as it would have melted his cake before he'd had a chance to blow it out!
Happy birthday, Humphrey!
For more cute animals, check out our gallery below:
Copyright: Rex Features Richard Waters/Solent News