This essay argues that Hannah Arendt’s conception of public space can contribute to the definition of material and virtual public spaces in contemporary social movements. By investigating Tahrir Square as a material public space and We are All Khaled Said Facebook page as a virtual public space during the Egypt 2011 revolution, this essay studies the relationship between these spaces and the events of the revolution. It shows that Arendt’s concepts of action and speech can theorize the virtual and public spaces of the Egyptian revolution.