Heidi Blair Pratt (born Heidi Blair Montag on September 15, 1986) is an American reality television personality. She is known for starring on the former MTV reality series The Hills. At one point, the series, which aired from May 2006 through July 2010, followed the life of her former friend and housemate, Lauren Conrad, then later followed Kristin Cavallari, another friend of Montag's.
During The Hills, Montag began dating cast member Spencer Pratt. In November 2008, the couple eloped to Mexico, though they later married in the United States, in April 2009. In July 2010, Montag filed for divorce after fifteen months of marriage to Pratt. However, the couple later called off the divorce.
Starting in 2007, she began a financially unsuccessful music career. Her first studio album, Superficial, was released in January 2010.