In a post on New Idea's Facebook page, the mother of the former Australia's Got Talent winner praised his relationship.
"Yes, he's in love, and I am so very happy for him and proud of him," she wrote.
Rachel also addressed allegations by fans on social media that the 20-year-old has undergone a dramatic transformation in recent years and appears to have undergone cosmetic procedures.
"Jack has never had even one cosmetic surgery procedure.. he has gone from a little boy to a man.. his looks changed because he grew up! [sic]".
At age 14, Jack admitted to paying for dental veneers in the midst of the AGT finals.
"I've been wanting to get my teeth fixed for ages and am really happy with them," he told The Sunday Telegraph.
Today, Jack changed his Instagram tag line from 'emotionally unstable washed up popstar' to 'Sydney based emotionally unstable icon'.
This article originally appeared on New Idea.