It's the first 1D birthday of 2013 - Zayn Malik's!

The Bradford Bad Boi is 20 years old today. Happy birthday, Zayn! 

Everybody's already sending Zayn some birthday wishes, so why don't you tweet him a sweet message to @ZaynMalik?

We hope Zayn has an amazing day celebrating the end of his teenage years!

Thanks to Wambie girls Avril and Halle for sending this in.