Differences between acting when you are working in film, theatre or radio "How do you think acting is different when you are working in film and tv, theatre and radio?" Acting can be very different when you are working in film, theatre and radio. There is a big difference between "visual acting" (films and theatre) and radio acting. Firstly, when you act, you have to convey feelings to the audience that is watching or listening to you and to do that, actors have to use both their body language and their voice, whereas radio speakers only can use their voice. In the radio, "you have to be able to raise one eyebrow with your voice". Secondly, radio and theatrical acting have one thing in common: spontaneity. Although also in the cinema a good acting is important, directors may decide on film the same scene more than once, if they dislike it, in order to obtain what they want. In theatre and in the radio (unless it is a record), the actor or the speaker has to do his/her best in the course of the performance. Obviously, those who work in theatre or radio are experts of their jobs. They know their art deeply and they usually stage or act a script they have learnt. Even so, one play staged in different theatres and places is never the same, for instance.