Shoshanna Lonstein Gruss (born May 29, 1975) is an American fashion designer and the founder and creative director of the fashion label Shoshanna, which was launched in 1998.
Shoshanna Lonstein was born and raised in Manhattan, New York. She attended Nightingale-Bamford School for girls in New York City's Upper East Side, graduating in 1993. She began college at George Washington University in Washington, D.C. but, in 1994, transferred to the University of California, Los Angeles. In 1997, she graduated from UCLA with a double bachelor's degree in history and art history. Upon graduation, Shoshanna decided to explore her interests in fashion by starting at the ground level, working at a lingerie factory.
With a loan from her father, Zach Lonstein, chief executive officer of Infocrossing, she started her clothing company in 1998 with the mission to design a clothing line that appealed to different body types.