A mobile terminal and controlling method thereof are disclosed, by which image data of a counterpart having triggered an event can be displayed. The present invention may include a display unit configured to display information, a wireless communication unit configured to communicate with an external server that stores first image data and to communicate with a counterpart terminal, a memory to store a second image data, and a controller, in response to an event triggered by the counterpart terminal, to extract an image data related to a counterpart from one of the first image data and the second image data, and the controller to output the extracted image data on a portion of the display unit to notify an occurrence of the event.