Initiating a conference in a conferencing system (e.g., a videoconferencing or audioconferencing system). Input may be received to the conferencing system from a mobile communication device. The input may specify one or more participants in the videoconference, e.g., by selecting from contact information stored on the mobile communication device. Accordingly, the conferencing system may initiate the conference based on the received input. The videoconference may include the one or more participants selected from the contact information stored on the mobile communication device.