Demi Lovato and Niall Horan 'share romantic dinner'

Niall Horan and Demi Lovato have reportedly been seen sharing a late-night dinner together, adding fuel to ongoing rumours of a romance

Reports of a fling between the pair began earlier this year, although both Lovato and Horan have vehemently denied the claims.

A source told Celebuzz that the pair were spotted together after the recent MTV Video Music Awards, where Horan's band One Direction won three awards.

The pair were allegedly seen sharing a meal at the Pink Taco restaurant in Century City, California on Thursday night (September 6).

"It looked like a first date," explained the source. "(They were) sharing guacamole and queso as they got to know one another, and kept it really private and low key."

Horan has also sparked a playful flirtation with singer Katy Perry, who he kissed on the VMA stage after winning an award.

Twitter / @NiallOfficial

Perry later tweeted at him: "I'll be your Mrs. Robinson."

Watch a promo for The X Factor USA, featuring Demi Lovato as a judge, below:

> Katy Perry, Niall Horan kiss at MTV VMAs: 'I'll be your Mrs Robinson'> Justin Bieber, One Direction stars hang out after MTV VMAs - pictures> One Direction: 'Prince Harry is a strong figure'