The rumours of a romance between Mullingar's finest Niall Horan and Hailee Steinfeld were first sparked when the pair were spotted together at a Backstreet Boys concert last month.

Now, those fans have been firmly flamed by a picture that the actress posted to Twitter.

In it, she's wearing an official Niall Horan t-shirt and is clearly backstage at a gig venue - it looks like the O2 Academy in Brixton, where Horan played recently.

Of course, it's also possible that the pair are just friends - but would you turn up at a friend's gig in London wearing their t-shirt, especially after rumours of a romance that neither of you have denied?

This could be the celeb relationship we've all been waiting for, people.