Method and device to create interactivity between a main device and at least one secondary device

A method to create interactivity between a main device and a secondary device. The method comprises receiving a main stream comprising a signal indicating the availability of the ongoing interactive experience related to the audio/video content and extracting the interactive data from the main stream, obtaining a main interactive application related to the interactive data by the main device, obtaining a secondary interactive application related to the interactive data by the secondary device, loading the main interactive application into a software module of the main device, executing the main interactive application with all or part of the interactive data, collecting by the main interactive application of the main device, result of user's interactions made on the secondary device during execution of the secondary interactive application, processing the received user's interaction by the main interactive application to produce a result, displaying the result on the screen together with the audio/video content.