According to a source who broke the news to People, the engagement is recent, and they are just two people who have found love quickly.
Another insider close to the couple revealed to Us Weekly that Grande is in no rush to walk down the aisle: "They are a ideal fit".
"They both started talking about it this past weekend".
Social media has been graced with ultra cute snaps of the pair ever since and they most recently attended Kanye West and Kid Cudi's Kids See Ghost listening party in Los Angeles where they were spotted getting very cosy.
The engagement definitely comes as a surprise since they've only been dating for one month. "It's nothing they've been hiding", a source close to the couple told People. "Their friends are really excited and supportive".
Soon after the engagement news broke, Ariana posted a cryptic tweet that read, "i love u", with Emojis of a monkey covering its eyes. Davidson also got a tattoo of a bunny mask, inspired by the artwork for Grande's 2016 album Dangerous Woman, behind one ear. Meanwhile, Davidson recently broke up with his girlfriend of two years, Cazzie David, after almost two years of dating.