A social networking system allows a user to create an event in the social networking system while viewing a web page from a third-party website from a domain different than the social networking system. A widget or other social plug-in is included in the web page, and user interaction with the widget communicates information from the web page to the social networking system. An event object is created in the social networking system from the information from the web page. The social networking system may perform various actions to increase user interaction with the created event object, such as identifying additional users to invite the event or identifying users attending the event to other users.