This study aimed to determine what are the dimensions of brand personality perceived by young consumers in the U.S. and Brazil, when it comes to brands McDonald s and Subway, and if these dimensions have similar settings in both countries. We used the dimensions of brand personality proposed by Aaker (1997), in the American context, and Muniz (2005), in Brazilian context. From these two studies, we obtained a single scale with 67 items for measuring brand personality. The field research was conducted through self-structured questionnaires, hand delivered to respondents by the researcher. A convenience sample was composed of 203 young Brazilian consumers (students of PUC-Rio) and 207 Americans (students of Boston University). We identified five dimensions of brand personality, as previously studies, for each of the brands studied in each country. The survey also verified the influence by relationship between familiarity and brand personality perception among consumers. The results were analyzed using the techniques of exploratory and confirmatory factor analysis. The findings point out similarities and differences between the perceptions of personality of the brands McDonald s and Subway, from young Brazilian and American consumers.