Gene Kelly was at the height of his powers in 1951, starring in musicals for MGM, and choreographing some of them. Here, Vincent Minelli directs, but the dancing is by Kelly. Leslie Caron makes her film debut, and the rest of the cast has a decidedly continental vibe. The film is “inspired” by George Gershwin’s 1928 musical of the same name, but the writing credit here goes to Alan Jay Lerner, aka half of the celebrated Lerner and Lowe musical composing team. An American in Paris won a boatload of Oscars, including Best Picture....