Carino is a talent agent at CAA (Creative Artists Agency) who works with huge celebrities. He specializes in commercials and endorsements, and according to IMDb Pro, his clients include Margot Robbie, Johnny Depp, Emilia Clarke, Zac Efron, Kelly Clarkson, Britney Spears, One Direction, and Justin Bieber. Ever heard of any of them? He also represents Lady Gaga herself, which is likely how the two met. 

The pair was first spotted together in January 2017. Soon after, in February, Gaga hosted the Super Bowl, and Carino was right there by her side. He probably would have been there anyway, because he's her agent, but they were giving serious couple vibes by kissing (big giveaway!) and taking cute selfies together on the field. If you're being open about your relationship right in front of cameras broadcasting to many millions of people, you're probably ready to go public. In the same month, People confirmed that the two were officially an item.