And it didn’t take long for the singer’s band mates to send their birthday wishes to him either. First to wish Zayn Malik many happy returns was eldest member of the group Louis Tomlinson, 21. He tweeted: “Massive happy birthday to my brother @zaynmalik . See you in a bit ! Huge love !” Up next was Niall Horan ,19, who clearly only likes to celebrate birthdays in one place. Down the pub.