Harry Styles has admitted to feeling a bit "old" after he turned 19.

The One Direction singer hit the milestone today (February 1) as he veers towards coming out of his teens.

However, it seems the new age isn't the most exciting thing to have happened to the global superstar, with Styles tweeting:

"I feel olllllllllllldddddddddddd."

One Direction session drummer Josh Devine meanwhile said on Twitter: "Happy Birthday to my bro @Harry_Styles, Have a great day mate! x."

Two One Direction fans meanwhile named Lennon and Maisy paid homage to Styles' birthday with an adorable song, which can be viewed below.