Ulla is the female hero in Mel Brooks' The Producers. She is played by Uma Thurman in the 2005 movie remake.
She is a young Swedish woman who becomes Max's secretary. In the 1968 film, Ulla is introduced as a "toy" that Max found in the local library, and is a symbol of his new found affluence. She can speak little English, but is a jiggly dancer, and can dance better than she can type. She also constantly says "God dag på dig", which means "good day to you" in Swedish (with a faux-Swedish accent), and provides a sexier counterpoint to Max's older girlfriends.
In the musical adapted from the film, Ulla introduces herself as a Swedish actress looking for a part in Max and Leo's production Springtime for Hitler. She is a stereotypical Swedish woman: tall and beautiful with lovely blonde hair. She performs a song she wrote called "When You Got It, Flaunt It". She decided to audition when a "crazy man" (Max) yelled at her the previous day. While the casting isn't to start for quite a while, Max and Leo hire her as their secretary/receptionist. Following the unwanted success of the musical, she and Leo flee to Rio de Janeiro where they marry. Her maiden name is never mentioned, but by the end of the play she is Ulla Inga Hansen-Bensen-Yanson-Tallen-Hallen-Svaden-Swanson Bloom.
Earlier, Max and Leo ask her to clean up their place while they're gone, but she doesn't understand English very well, and after they leave, she paints Max's office entirely white. Little of her role in the Springtime for Hitler play is shown, but she plays a showgirl representing the German Imperial Eagle and later appears as Eva Braun. In Max and Leo's second production, Prisoners of Love, she plays the lead prisoner/singer.