While it's only now taking over all your feeds, the Google Arts & Culture app has been around since 2016. This face match feature, however, was added in mid-December and has since been marching toward social media dominance, reaching the No. 1 slot for free downloads in the app store.
Exactly how the face match app works is a bit mysterious, but basically it compares your selfie to works of art from 1,200 museums in over 70 countries and finds the closest match it can, with varying degrees of success. To do this, it makes a "faceprint" of your unique attributes and compares that to the faceprints in the portraits.
Crucially though, it doesn't go for an identical face. Instead you're given a percentage of how close the pairing is. We weren't able to break above a 50% face match, and you may find yourself next to some fairly unflattering faces. Fortunately, though, the app gives you a selection from which you can choose the pairing most aligned with your personal brand, exactly as the old masters intended.