I believe this movie really centers on Kay Thompson, even with Audrey Hepburn and Fred Astaire involved. She’s excellent as a 1950s version of Anna Wintour in this pleasant, though somewhat stretched-out, musical comedy. Annoyed by the rather dull nature of her magazine "Quality," she decides to completely redesign it. Everything is pink! A bookstore serving as a backdrop for a photo shoot featuring “Avery” (Astaire) leads to an unexpected discovery – “Jo” (Hepburn), who seems like the fashion world's equivalent of Herod to babies. “Avery,” however, proposes a deal: she’ll do a photoshoot in Paris if she gets to meet "Prof. Flostre" (Michel Auclair). What follows is quite foreseeable—a standard love triangle with “Jo” caught in the middle, unsure which way to turn. George and Ira Gerschwin wrote the musical numbers, and while they are nicely presented, the film doesn't have a standout song. Nevertheless, Thompson shines as the boss who isn’t messing around; the dance sequences are vibrant and full of energy, and Hepburn brings a wonderful spark and eagerness to her role—she handles the musical numbers with ease. Astaire isn't at his peak, and Robert Flemyng's accent is less than ideal, but ultimately, everything resolves itself in an agreeable way.

Source on TMDB