Susan Nicole Downey (née Levin; born November 6, 1973) is an American film producer. Until February 2009, she was Co-President of Dark Castle Entertainment and Executive Vice President of Production at Silver Pictures, Joel Silver's production company, but has since stepped down to work more closely with her husband, Robert Downey Jr. The couple has formed their own production house named Team Downey.
Levin was born in Schaumburg, Illinois, to Rosie and Elliott Levin, a businessman. She became interested in the movie business at age 12. She graduated from Schaumburg High School as class valedictorian in 1991. She is Jewish.
Interested in pursuing a career in film production, Levin moved to California and graduated summa cum laude from the University of Southern California School of Cinematic Arts. She began her career at Threshold Entertainment, where she oversaw the development and production of projects based on well-known properties for both the company's film and television slates. These include the feature films Mortal Kombat and Mortal Kombat: Annihilation, as well as the 22-episode TV series Mortal Kombat: Conquest which ran on both TNT and in syndication.