In the romantic comedy-drama film Under the Tuscan Sun, Sandra Oh plays the role of Patti, a close friend of the main character, Frances. The movie follows Frances, a recently divorced writer, as she impulsively buys a villa in Tuscany and embarks on a journey of self-discovery and love. Sandra Oh's performance in Under the Tuscan Sun adds depth and humor to the film, which has become a beloved favorite among fans of the genre.