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We present the galactic stellar age-velocity dispersion relation obtained from a semi-analytic model of galaxy formation. We divide galaxies into two populations: galaxies which have over-massive/under-massive black holes (BHs) against the best-fitting BH mass-velocity dispersion relation. We find that galaxies with larger velocity dispersion have older stellar ages. We also find that galaxies with over-massive BHs have older stellar ages. These results are consistent with observational resultsdoi:10.3389/fspas.2017.00013 fatcat:ddlnrkib3jdotlc4zlw7sbcslm