PRINCE William and Kate Middleton have received an unusual wedding present from Chester Zoo – a baby penguin called Acorn.

But little Acorn won’t be moving in with The Duke and Duchess of Cambridge any time soon.

He has been adopted by the royal pair and will remain at the zoo with 49 other Humboldt penguins.

The zoo unveiled its unique gift to the happy couple after asking followers on social networking sites to choose which of its 400 different species the royal pair should sponsor.

And the winner was emphatic as fans p-p-p-picked the popular penguins, which received more than 20% of the votes.

Rothschild giraffes and African painted dogs were a distant second and third, with other suggestions including royal starlings Billy and Nate, a grey crowned crane and a black rhinoceros.

A spokesman for the zoo said: “It’s a real honour to be able to boast Prince William and Kate as penguin adopters.

“Hopefully the happy couple will come and see little Acorn playing in his pool very soon”.

Humboldt penguins are an endangered South American species indigenous to Peru and Chile.