Societies worldwide are experiencing fundamental changes through large-scale migration and mobility across national borders. In our transnational world, the nation state is no longer the sole institution for the organization of people’s lives. Questions about the kind and extent of transnationalism, its determining factors and consequences, have been researched for different social groups by scholars of migrant transnationalism as well as scholars of horizontal Europeanization. Neither of these two research traditions, however, adequately addresses new mobilities and identifications of Europe’s second generation. Scholars of second generation transnationalism focus uniquely on the links between the Country of Residence and the ancestral home country. The political sociology of Europe analyses cross-border mobility and the emergence of collective identities, but disregards the second generation’s contributions to horizontal Europeanization. Particularly in Europe, where citizens have the right to free movement and distances between countries are short, we can expect that the second generation develops new forms of mobility that cover other than the parents’ home country. Drawing on the two research traditions, this project analyzes new mobilities and collective identifications, their influencing factors as well as effects, of Europe’s second generation. Employing a qualitative research design, including biographic-style interviews and documentary photography, the project captures the contributions to horizontal Europeanization of second-generation Turks and sub-Sahara Africans in Berlin and Paris. We will thus view the second generation, particularly those with parents who migrated from a non-European country, not only as migrants but as Europeans, who shape Europe through their practices, networks and identifications.