With increasing diversity of migrants in Europe, questions around cultural integration are gaining importance. This study focuses on attitudes towards homosexuality amongst first and second generation immigrants from 186 origin countries to examine the role of religion, origin country socialization and acculturation. There is clear evidence for intra- and intergenerational acculturation of attitudes with declining importance of origin country context. While individual characteristics of migrants and origin country context can explain a substantial part of religious group differences particularly amongst the first generation, Muslims and to a lesser extent other non-Christian and Eastern Orthodox migrants hold overall more negative attitudes. [ABSTRACT FROM AUTHOR]