This intervention study explored the effects of a newly developed intergenerational encounter program on cross-generational age stereotyping. Based on a biographical-narrative approach, participants were invited to share ideas about existential questions of life. Therefore, the dyadic Life Story Interview had been translated into a group format, consisting of 10 90-min sessions. Analyses verified that LSEP participants of both generations showed more favorable CGAS immediately after, but also 3 months after the program end. Such change in CGAS was absent in a (...) control group. The LSEP-driven short- and long-term effects on CGAS could be partially explained by two program benefits, the feeling of comfort with and the experience of learning from the other generation. (shrink)