The actor, who played bully-turned-closeted gay sportsman Dave Karofsky on "Glee," tells UsMagazine.com he bought the engagement ring during a shopping trip while his actress girlfriend was getting ready for a night out in the Italian capital.
But the couple is still undecided about when and where to exchange vows. Adler says, "There are so many things we want to do. One day we say we want to get married in a winery in Malibu. Then it's a rooftop in New York. Vegas, elope to a chapel. London. We don't even know. When we figure it out, we'll plan it. But right now we're having a good time."