Electoral turnout has been declining in nearly all Western democracies. While scholars have identified the ‘negative’ effects of generational replacement and forecasted how turnout will continue to decline, the turnout in the 2019 European Parliament election surged to its highest participatory level in the last two decades, driven surprisingly by increased youth participation. This age-period-cohort study investigates whether and to what extent younger generations socialised in changing electoral contexts turn out at different levels than their generational counterparts. Analysing survey data from the EES and the CSES across 28 European countries over decades reveals a reversing generational participatory pattern in EP elections and a narrowing turnout gap between national and European Parliament elections across younger generations, despite differences in Western and Eastern Europe. These results have important implications for the effect of generation on turnout and future trends of electoral participation.