The article presents the results of a longitudinal research of personal characteristics of actor students, on the base of the Moscow Theater College under the direction of the national artist of USSR O.P. Tabakov. Research is carried out in 2010 to the present days and work with scientific program, which began in 1976. That results was got by R. Cattell’s 16 PF test. In the reasearch were interviewed 96 actor sudents. Discussed dynamics of personal change during first year in the theatre coolledge; the differences between successful and unsuccessful students and the results of structural analysis of the personal characteristics got by R. Cattell’s 16 PF test. The obtained results show that during the first year of studying the general direction of students’ personality changes is oriented to the increase of emotional sensitivity, motivation and anxiety, as well as to the reduction of radicalism. The major differences between successful and unsuccessful acting students appear in directions of personality changes throughout the first year. One of the important point is the fact of change itself: students who remain static or demonstrate individual changes, which do not coincide with the group tendency, are less successful. The structural analysis of personal characteristics of successful students enabled us to determine two invariant factors: “emotional excitability/control” and “emotional openness”, which represent two mandatory features of a successful actor. Other personality scales are subjected to transformation under the influence of external factors and teaching techniques.