Pratt lasted 19 days inside the house, before exiting on 5 September 2014.Pratt returned with a feature role for the eighth series of Made in Chelsea and met new boyfriend Josh Shepherd on the reality-programme.In 2010, the series underwent several casting adjustments and saw Pratt become a primary cast member, joining Patridge, Lo Bosworth, and Kristin Cavallari.She is the younger sister of Spencer Pratt, also a television personality.
In 2007, she came to prominence after being cast in a supporting position in the reality television series The Hills, which documented the personal and professional lives of Lauren Conrad, Heidi Montag, Audrina Patridge, and Whitney Port.
However, upon the realization that they attend the same college, they became friends.
The fourth season saw Pratt's role increased, with more emphasis placed on her personal life and her past drug abuse.
During the third season, Conrad ended her friendship with Montag after she suspected that the male Pratt was responsible for rumors of a sex tape involving her and her former boyfriend Jason Wahler; the ensuing feud between the three carried through each subsequent season.
During production of the third season, the female Pratt first appeared on the series while angrily confronting Conrad at a club.