Can I have more than one face registered with my iPhone X's Face ID?

If I want to give access to my iPhone X to somebody else, can Face ID recognize both of us?

While you could have many users with Touch ID, Face ID only works with one face, so each iPhone X can only have one user that can access it via Face ID. Of course you can always give your passcode to somebody to use once they've failed the Face ID authentication.

Can Face ID recognize multiple faces?