The aim of the article is to explore how the migrant identity (especially, of the first generation) is changing under the influence of migration. Accordingly in the first part of the article the transnationalism and the concept of transmigration in relation to migratory experience are discussed, the second part is focused on the questions of identity and its boundaries, and the third part is based on the interpretation of empirical data from anthropological fieldwork by paying attention to the background, language and festivals of the immigrants as particular markers of the identity construction of the Lithuanian migrants in Northern Ireland.