Sonia Dronnier (born 7 October 1960), known by her stage name Viktor Lazlo, is a French writer,singer, and comedian.

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 aswell as several tv shows and litteray events.

She has published six novels writer between 2010 and 2024, and has also written short stories.

Dronnier took her stage name from Paul Henreid's character Victor Laszlo in the 1942 film Casablanca. She sings and acts in French, English, Spanish and German.

In October 2016, Lazlo announced the release of her new single "Promised Land". In February 2017, she released her new single "Lola & Jim" followed by new studio album Woman in October 2017.