An American in Paris – Rotten Tomatoes

Jerry Mulligan (Gene Kelly) is an American ex-GI who stays in post-war Paris to become a painter, and falls for the gamine charms of Lise Bouvier (Leslie Caron). However, his paintings come to the attention of Milo Roberts, a rich American heiress, who is interested in more than just art.
— Read on www.rottentomatoes.com/m/american_in_paris