The paper analyses the phenomena of congruence between consumer, brand and store personality and its effect on attachment to brands in luxury sector at an international level. From a theoretical point of view, human personality, brand personality, store personality, congruence and attachment constructs are considered. From an empirical point of view, the paper presents the results of a quantitative primary research run on a sample young people “luxury experienced” from 10 countries. The empirical research considers specifically 6 luxury brands. In term of results this paper presents the validation of the personality congruence measurement scale proposed by the authors; furthermore the research highlights the existence of a correlation between personality congruence and brand attachment.