https://techcrunch.com/2018/06/05/ios-12-face-id-two-users/

From advancements in AR to Memojis to group FaceTime, there is plenty to be excited about with iOS 12. But one of the more practical updates to Apple’s mobile operating system, coming this fall, went unmentioned during the keynote at WWDC.

According to 9to5Mac, iOS 12 will allow for two different faces to be registered to Face ID.