See Pics from Niall Horan's 21st Birthday Celebration

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Niall Horan's 21st birthday is coming up very soon (this weekend! September 13! Mark your calendars!), but the One Direction star celebrated his big day ahead of time with friends and family in London.

Credit:Twitter

 His bandmate Louis Tomlinson came with  Eleanor Calder

Eleanor Calder 

Louis Tomlinson

 and they looked very nice dressed in casual but coordinating styles.

Niall and Greg Horan

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Instead of your typical party cone hats, the birthday boy even had his guests wear silly masks with his face on them! 

Credit:Twitter