The 20-year-old singer and Gomez have split up many times since they began dating in 2011 and now Bieber revealed to attorney Mark DiCowden that the pair were back together, reported E! online.
"Justin confirmed the relationship during his follow-up deposition in relation to a lawsuit filed against him by a photographer who claims he was assaulted by the star," a source said.
The rest of the deposition was "uneventful" and Justin was reportedly well-behaved throughout.
Recently, the 'As Long As You Love Me' hitmaker has sparked rumours about the couple rekindling their romance through a variety of Instagram posts.
The pair have also been spotted spending time together including going horseback riding in Canada and they appeared "very close" when they arrived at a Bible study class in Los Angeles last month.