The One Direction hunk reportedly enjoyed a romantic trip to the movies with the Victoria's Secret beauty at the Everyman cinema in Belsize Park, north London, this weekend.
A source told the Daily Mirror newspaper: ''Barbara came in first and was playing on her phone until Niall arrived. He had a security guard with him, and they sat in the front row so nobody could turn around to see them.
''He kept a baseball cap on and pulled it low, to try to avoid being seen. They clearly wanted to keep a low profile.''
Niall and aspiring actress, Barbara, both 20, appeared to hit it off as they watched the film adaptation of Suzanne Collins' best selling novel, 'The Hunger Games: Catching Fire'.
The source added: ''They were laughing and joking together throughout the film, and both were dressed casually. You could tell they were comfortable in each other's company.''
Barbara also reportedly tweeted Niall after the date saying ''Hunger Games buddie,'' although the Tweet is no longer visible on her page.
Niall has recently been linked to 'X Factor' star Tamera Foster and 'Made In Chelsea''s Louise Thompson, whilst Barbara has previously denied being in a relationship with Justin Bieber.