Open the event page in your Facebook mobile app. 2. Tap the "Responses" field. 3. Next to the name of the person you want to uninvite, tap the pencil icon. Related coverage from How To Do ...

As it turns out, you can actually have multiple hosts for Facebook events. There is a place to add co-hosts in the setup page for a new event. Here's how to do it in a browser on your Mac or PC.