Due to One Direction's constant touring, Niall Horan will be celebrating his 21st birthday in the United States. So, while on a short break, the singer celebrated in London with some family and friends.

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E! Online reported Monday that Horan celebrated at the Shoreditch House on Saturday night with a birthday bash. Among those in attendance included Horan's brother Greg Horan, MTV's Laura Whitmore, Voice of Ireland coach Bessie, James Corden and 1D bandmate Louis Tomlinson along with girlfriend Eleanor Calder. No other 1D members were apparently there, however.

After the party, Horan's brother Greg wrote on Twitter "Big love bro nearly 21 wow I remember the day u were born mate love you more than anything and I'm so proud x x".

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Horan also tweeted, "What a great night last night! Thanks everyone for coming to celebrate my 21st with me! Had a great night with friends and family".

One Direction just revealed their new album Four would be coming out on Nov. 17. They also released a free song called Fireproof to fans yesterday. Horan tweeted Monday, "We wanted to give 'fireproof' to you as a gift, we feel it will give you a good idea of where we are going with ' FOUR' will sound like!"

1D continues their Where We Are tour again September 11 in Pasadena, Calif. at the Rose Bowl.

Tags: One Direction Niall Horan