Facebook events take just minutes to create and provide a forum for you and your friends to talk about upcoming parties. When you create the guest list for your event, each guest receives a notification and is able to RSVP right on Facebook. The person who created the event is an administrator, and any guest who has responded as "Attending" may also be made an administrator. Among the privileges of being an administrator is the ability to uninvite guests by removing them from the event's guest list.
Click on the "Events" link on your Facebook home page, located on the left side of the screen just under your name and profile picture.
Click on the title of an event to open the event's page.
Click on the blue "See All" link located immediately above the guest list, which runs vertically down the left side of the screen. A pop-up window appears that lists all of your invited guests.
Click on the grey "x" next to a friend's name to remove him from the list of invitees. He will no longer appear on the guest list---if the event is private, he will no longer be able to see the event page.
If you have a lot of invitees and cannot locate a particular guest on the list, use the grey icon at the top of the guest list to narrow down the guests by the status of their RSVPs.