Leni Stern (born Magdalena Thora in Munich, Germany) is an electric guitarist, singer, and n'goni (Malian banjo-guitar) player. She was interested in music from an early age, beginning piano studies at the age of six and taking on the guitar age of eleven. Forming her own acting company at the age of seventeen, Stern attracted media attention and performed her radical productions in front of sold-out European crowds.

In 1977, Stern chose music over acting, and left Germany for the United States to attend the Berklee College of Music in Boston, studying film scoring. She gave up film scoring in favor of the guitar and moved to New York City in 1981, playing in various rock and jazz bands. In 1983, she formed a band of her own with Paul Motian on drums and Bill Frisell on guitar.