Stephanie Pratt (born April 11, 1986) is a American (United States) reality television personality (reality television) known for her role as a cast member on MTVs The Hills (The Hills (TV series)). She is the younger sister (Sibling) of Spencer Pratt, and the sister-in-law of Heidi Pratt (Heidi Montag). She is friends with Lauren Conrad. It is shown on The Hills that she does not have a strong relationship with her brother.

She is regularly featured on E!s The Soup. Stephanie Pratt currently attends FIDM (Fashion Institute of Design and Merchandising).factdate=June 2009 She started the rumor that her brother Spencer and his wife Heidi Montag were tortured while on the set of Im A Celebrity... Get Me Out Of Here! (Im a Celebrity... Get Me out of Here! (US season 2)).However, the couple later denied that they had been tortured.

She has struggled with bulimia (Bulimia nervosa) in the past due to the pressure to be thin stemming from appearing alongside very thin co-stars on the show The Hills.In a 2007 US Magazine interview, Pratt revealed previous substance abuse problems and discussed an incident in which Pratt shoplifted $1,300 worth of merchandise from a Neiman Marcus in Honolulu in 2006, where she was working as a production assistant on ABC?s "LOST".

On October 18, 2009, Pratt was arrested in Hollywood, California (Hollywood, Los Angeles, California), on suspicion of drunk driving and booked into jail in Van Nuys (Van Nuys, Los Angeles, California). She took two breathalyzer tests, first blowing 0.08, then blowing 0.09. The legal limit in California is 0.08. She was released several hours later after posting a USD (United States Dollar) $5,000 bail.