Ursula Buchfellner (born June 8, 1961 in Munich, Germany) is a German model and actress. She was Playboy magazines Playmate of the Month for its October 1979 issue. Her centerfold was photographed by Peter Weissbrich. Ursula also was the Playmate for the December 1977 issue of Playboy German edition. It was later revealed that she was only 16 at the time. International acting and modeling careers followed Ursulas Playboy appearance. She was sometimes credited as Uschi Buchfellner, Ursula Fellner, Ulla Maris and Ursula Maris.

She starred mainly in European B-movies such as Sadomania, Ultimo Harem and Mandingo Manhunter. Spanish trash-video director Jesus Franco has employed her quite frequently for his productions.