It looks like One Direction's Niall Horan may be off the market, with reports claiming that the Mullingar man is officially dating Victoria's Secret model, Barbara Palvin.

The 20-year-old singer has been spotted with the Hungarian-born beauty on several occasions over the last month, prompting speculation that they are dating.

Now bandmate Louis Tomlinson's sister appears to have confirmed the news.

Writing on Ask.fm, 13-year-old Félicité 'Fizzy' Tomlinson said: "I haven't asked him, but when I was at X Factor [USA, earlier this week] Alberto from security said Niall's girlfriend Barbara was here.

"Liam [Payne] said everyone has girlfriends here tonight except Harry [Styles] so yeah they're dating."

Horan is believed to have introduced Palvin to his bandmates at a party in London earlier this month .