This study investigates self-perceived age among Baby Boomers in the UK, Germany, Japan, and Hungary, and identifies two horizontal segments based on the way consumers view their age Design/methodology/approach Questionnaires were used to sample 880 Baby Boomers. Structural equation modeling is used to investigate multinational measurement invariance of the cognitive age scale. Findings Two distinct segments are identified, providing support for a young at heart consumer culture in all nations in the study. Results also find cognitive age to exhibit partial measurement invariance, which is expected given the disparate nations under study. Research limitations/implications This research contributes to cross-cultural global age research which is still in an early pioneering stage. The study builds on a small number of previous studies that validate cognitive age, extends current knowledge of the measurement properties of cognitive age, and identifies two distinct international segments of Baby Boomers. Further research needs to delve into the antecedents of self-perceived age, particularly in the ways in which different life experiences and cultures may impact age identities. Practical implications The study has implications for marketing mangers wishing to target the increasingly important young at heart Baby Boomer. Originality/value The study uses 4 non-American countries, uses samples matched for chronological age, and does not use convenience samples, which make it unique in the cognitive age literature. The study has value for marketing managers, global age researchers, and consumer culture researchers.