Viktor Lazlo (real name: Sonia Dronnier, born 7 October 1960) is a French-Belgian singer. Born in France, she studied in Belgium, where she is primarily known.

Her biggest hit was "Breathless" in 1987. That year she also hosted the Eurovision Song Contest 1987 held in Brussels. Dronnier took her stage name from Paul Henreid's character Victor Laszlo in the 1942 film Casablanca.