Is Niall Horan officially off the market?

Is Niall Horan officially off the market?

IS Irish superstar Niall Horan off the market? 

The 21-year-old One Direction member was spotted out and about in London last night, partying with American pop princess Ariana Grande.

Ariana sang to 20,000 fans in London's O2 Arena last night on the first night of the British leg of her current tour - and Niall was on hand to help her unwind afterwards.

The pair were spotted, along with an entourage of friends, at Cirque Le Soir on Ganton Street, partying until the early hours.

Niall and his fellow One Directioners are currently touring the world with their massive On the Road Again tour.

They will play two dates in Cardiff this week before taking off to Europe and America, before coming back to play in Britain and Ireland in October.