Ulla Arnz-Wiesner (born in 1941 in Munich, Germany) is a German singer.
Ulla Wiesner was active from 1963 to 2002 as a singer. In 1965, she represented Germany in the Eurovision Song Contest, with her song, "Paradies, wo bist du?" (Paradise, where are you?). It scored zero points along with three other countries out of the fifteen which entered in total.
Since then, notable singles of hers include titles such as "Abends kommen die Sterne" (In the Evening the Stars Come Out), "My Darling", "My Love" and "Charade".
Wiesner married the German TV producer and personality Alexander Arnz (1932–2004) in 1999.