The publication claims that the duo have been dating for several months, after meeting through work while Delta was on her Wings of the Wild tour in October and November.
The new couple have been holidaying in Hawaii with friends for the past few days, according to the report, with a friend saying: “Delta is a free spirit, she’s very happy right now.”
The duo's social media presence has been quite sparse, with Matthew sharing just one post seeming to confirm their close relationship. In November, he uploaded a video of the pair working on new music with the caption "CREATE."
Delta was previously linked to Australian actor Hugh Sheridan earlier this year, though neither commented on the reports.