One Direction's Louis Tomlinson Celebrating 21st Birthday On Christmas Eve: "I'm Old!"

Conor Maynard and the 'Kiss You' singer's girlfriend have wished him a happy birthday today (24th December).

One Direction star Louis Tomlinson has joked that he feels "old" after turning 21 today (24th December).

The 'Live While We're Young' singer took to Twitter shortly after midnight when his followers began wishing him happy birthday.

Louis' Christmas Eve well-wishers included his "girlfriend" Eleanor Calder and Conor Maynard.

Replying to Conor's message, Louis tweeted: "Thanks mate ! Have a lovely Christmas . Catch up soon !"

At 21, Louis is the oldest member of One Direction – Liam Payne, Zayn Malik and Niall Horan are all 19, while Harry Styles is the youngest at 18.

One Direction returned to the UK last week following a brief trip to America, where they performed new single 'Kiss You' on The X Factor USA.

One Direction's Louis Tomlinson has been inundated with birthday messages on Twitter:

Louis Tomlinson birthday
The group are set to release the video for 'Kiss You' in the New Year.

'Kiss You' is the third single to be taken from their second album 'Take Me Home' following 'Live While We're Young' and 'Little Things', which was written by their friend Ed Sheeran.