|Born:||April 11, 1986|
2007–10: The Hills
In 2007, Pratt joined the cast of The Hills during the third season, as Spencer's angry sister who confronted Lauren Conrad. She eventually apologized to Lauren and became one of her close friends, causing a rift between her and Spencer. The fourth season saw Pratt's role increased, with more emphasis placed on her personal life and her past drug abuse. During the fifth season, Stephanie worked with Lauren at Kelly Cutrone's People's Revolution, though Lauren ended Pratt's internship, per Cutrone's orders, due to poor performance. Conrad left the series after the first half of the season. The second half of the season continued with Kristin Cavallari hired as the replacement narrator. Pratt and Cavallari began as rivals due to conflicts about Audrina Patridge's ex-boyfriend and a report linking Cavallari to drug use, though they would become friends during the following season. Pratt also became friends with Audrina and Lo Bosworth during the season. Despite rumors of not returning after the fifth, Pratt returned and was featured as a main cast member in the sixth and final sesason. Stephanie talks of her DUI arrest, and her sibling rivalry with Spencer became more intense as his behavior became more erratic. Stephanie and the rest of the cast either did not mention Spencer or Heidi after the two were permanently axed from the series, or kept their comments focused on how no one knew what the couple were up to, and had avoided any recent contact with them. The Hills ended its series run on July 13, 2010
Pratt is the younger sister of Spencer Pratt, and the sister-in-law of Heidi Montag (both of whom are on The Hills.) She has struggled with bulimia in the past due to the pressure to be thin stemming from appearing alongside very thin co-stars on the show. In April, 2010, Pratt posed nude for PETA's Be Nice to Bunnies iPhone application, which is intended to help the public find stores and products that are kind to animals. Stephanie Pratt has stated in many public appearances that she has not seen her brother or his wife Heidi Montag in more than a year. Stephanie Pratt remains close friends with her former Hills co-stars, Lauren Conrad and Lo Bosworth.