This paper investigates ideal ages for marriage and parenthood among immigrants from over 160 countries origins living in 25 European countries. Ideals regarding the timing of family formation are indicative of how individuals perceive the family life course and provide insight into familylife aspirations and the meaning attached to these transitions. Using data from the European Social Survey (Round 3, 2006; N = 6,330) and a cross-classified multilevel modeling approach, we investigate associations between the influences of the dominant family formation timing patterns in countries of origin and settlement, individual-level characteristics, and ideal ages. We make innovative use of a standard demographic measure, the singulate mean age of marriage, to measure family formation patterns. Results suggests that residential context influences are associated with the timing ideals of all migrants, but origin influences seem to be associated with the ideals of only the most recent migrants.Key words: family formation, ideals, immigrants, second generation, family change, Europe Page 3 of 42The timing and sequencing of events is central to the development and trajectory of life courses (Billari, 2005). Life course researchers have stressed the importance of context and time in shaping both the experience and perception of events in the life course (Elder Jr., 1985). Also in studies of immigrants, emphasis is placed on the contextual (socialization) effects of country of origin and settlement when it comes to life course transitions and preferences (De Valk, Wingens, Windzio, & Aybek, 2011). Timing preferences for family life transitions are likely determined by individual characteristics and experiences, but also influenced by dominant, macro-level family formation systems. However, comparative studies of the timing of family life events among those of immigrant origin are still largely lacking and existing work on timing preferences mainly focuses on one country or one migrant origin group (e.g. De Giuliano, 2007). But with information on diverse migrant populations across a range of countries of settlement, we can shed light on the influences of family formation systems in both origin and destination that may shape timing preferences for family life transitions. In this paper we fill this gap in the literature and explore family formation ideals regarding the timing of marriage and childbearing among immigrants of diverse origins across Europe.Forming a partnership, getting married, and bearing and raising children are significant transitions for individuals. Ideals regarding the timing of these events may be indicative of the meaning attached to these transitions and how they should best fit into the life course. Moreover, in the case of migrants, ideals may be a particularly useful measure of attitudes toward the family life course since the timing of actual family behaviors is often distorted by the act of migration (e.g. Andersson, 2004;Milewski, 2007;Toulemon, 2004). The perceived ideal timing of family ...