The mischieveous penguin in this clip can't be bothered to feather his own nest, so he resorts to bit of cheating...
His buddy is hard at work in the colony on Ross Island in Antarctica, bringing stones back to make a home.
There are half a million penguins in the colony so the nests have to be special to attract a lady penguin.
But as soon as he turns his back to collect another one, this pickpocket penguin rushes over and nicks it!
The look on the innocent bird's face when he realises it's gone has had the Newsround office in stitches all morning!
You can see more on the BBC's Frozen Planet series, starting on Wednesday 26 October at 9pm on BBC One.