Gender norms are widely recognized as key drivers of persistent gender gaps in the labor market, yet little is known about how these norms evolve or can be influenced. This paper provides new evidence that exposure to university classmates born in more gender-equal environments shapes women’s early-career labor market outcomes. I exploit quasi-random, cross-cohort variation in the geographical origins of peers within Master's programs in Italy, leveraging comprehensive administrative and survey data covering the universe of students. Exposure to female classmates born in provinces with one standard deviation higher female labor force participation significantly increases women’s likelihood of entering full-time jobs and sorting into higher-paying occupations, reducing early-career gender gaps by 20–40%. Using new data I collected on students’ job-search preferences and beliefs, I show that peer effects operate primarily through two channels: reductions in the value women place on hours’ flexibility, and learning about job offer arrival rates. Peer effects are highly asymmetric, concentrated among women from less gender-equal regions, indicating that exposure can mitigate early-career disadvantages rooted in childhood environments. The results underscore the potential of educational policies that promote geographical diversity to shift gender norms and advance gender equality in the labor market.