Crystal Renn is an American fashion model and author.
- Born: 18 June 1986 (age 32 years), Miami, Florida, United States
- Height: 1.75 m
- Spouse: Gregory Vrecenak (m. 2007–2009)
- Books: Hungry: A Young Model’s Story of Appetite, Ambition and the Ultimate Embrace of Curves
- Agencies: Elite Model Management, Storm Model Management