It’s a pleasing pairing of Katharine Hepburn, performing exceptionally well, and Rossano Brazzi, who possesses an appealing and captivating quality. Hepburn portrays "Jane," an American woman past her prime taking a vacation in Venice when she meets "Renato," played by Brazzi—an antiques dealer with a slightly mischievous air but also undeniably interesting. “Jane” embodies the classic image of an older, unmarried woman; she’s led a solitary existence and feels unprepared to navigate the attention of a romantic interest. However, she also values sharing the beauty of Venice and wonders if "Renato" could be instrumental in her personal growth. Soon it becomes apparent that "Renato" is concealing something significant that will impact their connection! Hepburn's casting proves ideal; she conveys both an eagerness to learn and develop while simultaneously appearing vulnerable, much like the delicate Murano glass she often observes. Brazzi brings charm and polish, but also a genuine warmth and magnetism that makes for a simple yet enjoyable love story—a narrative that is complex, certainly, but never feels contrived or exploitative. Jack Hildyard and David Lean skillfully utilize their actors and the Venetian setting to craft an elegant and refined film, enhanced by Alessandro Cicognini’s original and fitting musical score, resulting in a very successful tale. The title itself isn't particularly memorable; it lacks impact, but the movie is visually striking and showcases two performers who clearly have great chemistry from the outset.

Source on TMDB