Heidi Blair Pratt (née Montag; born September 15, 1986) is an American media personality and singer. She came to prominence with her starring role on the MTV reality series The Hills from 2006 to 2010. The majority of the episodes followed the life of her former friend and housemate Lauren Conrad.
Ranked #36 on the Maxim magazine Hot 100 of 2008 list.
Her last name is the German word for Monday.
Held a marriage ceremony with boyfriend Spencer Pratt in Mexico on November 20, 2008. The marriage was not legal as a marriage license was never obtained and there was no civil ceremony.
She enjoys martial arts and grappling. Heidi trains Brazilian Jiu-Jitsu with black belt teacher Kevin Casey.
Younger sister of Holly Montag.
Sister-in-law of Stephanie Pratt.
