Fred Astaire by  Joseph Epstein, Yale University Press, 2008.

 

Epstein, on the theme of "Charm" in the movies, mentions Cary Grant (impersonating an American) and Robert Colman.For the French, Charles Boyer and Maurice Chevalier. For the Italian, Marcello Mastroianni.  An example of Russian charm is George Balanchini's, varying from an authoritarian touch to intimacy and even, at times,impersonal and aloof.  
"Vladimir Nabokov had almost the same type of charm." *

Fred Astaire embodies the North American style of charm (with less sophistication and cynicism as found in William Powell's "The Thin Man").

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*from the Portuguese translation of Epstein's original in English.