Brühl's first screen appearance was in the 1954 film Der letzte Sommer with Liselotte Pulver, but in the role of Dalli, in what became known as the "Immenhof films", she became famous in Germany. Die Mädels vom Immenhof (de), adapted from a novel by children's Writer Ursula Bruns, appeared in 1955 and was followed by two sequels, Hochzeit auf Immenhof (de) and Ferien auf Immenhof (de), at yearly intervals. She returned to the role in Frühling auf Immenhof in 1974.