The Australian hunk, 20, has been dating the American social media star for the past year, and they went public after Hemmings' fans discovered he was no longer single.
The couple recently hit headlines again amid rumours suggesting the singer had parted ways with his girl due to his busy tour schedule, but it appears Luke and his lady have since patched up any differences which may have driven them apart.
Arzaylea appeared to hint at a reconciliation last week (ends02Sep16), when she posted a photo of herself in her bedroom and captioned it, "new beginnings", and on Monday (05Sep16), she and Luke enjoyed a night out at Los Angeles hotspot The Nice Guy.
At the restaurant, the pair met up with Luke's fellow boy band star, One Direction's Niall Horan, who gave the young couple a ride in his car.
Luke hit it off with Arzaylea while attending reality TV star Kylie Jenner's 18th birthday party in Los Angeles in August, 2015.
Fans of the 5 Seconds of Summer star have made it clear they do not approve of Arzaylea, with some accusing her of being a gold digger by pursuing a relationship with the singer.
"(Luke's fans) want me to be this really horrible person," Arzaylea previously told Vice magazine of the backlash she had experienced. "But I'm not. I'm just a really normal girl who just happens to date someone not so normal."