Heidi Blair Pratt (born September 15, 1986) is an American singer and television personality. Montag is known for appearing on the MTV reality series The Hills.

Career

Reality TV
Born in Crested Butte, Colorado, Montag moved to California after graduating high school where she enrolled at the Academy of Art University in San Francisco. During freshman orientation, she met Lauren Conrad, who was then a featured cast member on the MTV reality series Laguna Beach: The Real Orange County.After Montag and Conrad transferred to Fashion Institute of Design & Merchandising in Los Angeles, Conrad received her own spin-off series The Hills, which premiered on May 31, 2006. Montag was featured in the series sharing an apartment with Conrad while studying at the Fashion Institute of Design & Merchandising. She eventually left the Fashion Institute in fall of 2005 when she was hired at Bolthouse Productions. According to Montag, she dropped out because she "did not find the school challenging." Within two years, she was promoted to event planner at Bolthouse, before being fired and then re-hired.

Montag appeared in every episode of seasons one and two of The Hills, and appeared in season three, which aired on MTV on August 13, 2007. In the summer of 2006, Montag began dating fellow Hills cast member Spencer Pratt, a former manager of Brody Jenner. Season 2 of The Hills (which aired from January through April 2007) focused on Montag's relationship with Pratt and its effect on her friendships with Conrad and fellow Hills cast member Audrina Patridge. On the Season 2 finale, Montag moved out of her apartment with Conrad to live with Pratt. Although Conrad maintained the two were still friends after Montag moved out, the friendship soon ended when Conrad blamed Montag and Pratt for spreading rumors about a sex tape featuring her and ex-boyfriend Jason Wahler. In October 2008, the pair reportedly ended their feud.

In August 2008, Conrad said that The Hills is "definitely reaching its end", citing the privacy pitfalls. Montag and Pratt have expressed an interest in adopting Conrad's lead role and narrator. In a recent radio interview with Ryan Seacrest, Montag said "I think that maybe Lauren is tired of [being on the show], but we’re just beginning," and that "We’re not even remotely sick of it." Whereas Pratt stated that, "sometimes the narrator has to throw their hate up on the wall and pass the mic", and expressed an interest in taking The Hills to a tenth season. In April 2009, Montag signed on to appear on the reality series I'm a Celebrity... Get Me out of Here!. Her appearance on the show, alongside husband Spencer, was criticized after the couple claimed they were subject to torture and left the show's set multiple times before returning and ultimately withdrawing.

Acting career
In November 2008 Montag and Pratt shot scenes for an episode of the CBS sitcom How I Met Your Mother. The two appeared as themselves in an episode aired in January 2009.