Born in October 1983, Holly Montag is the older sister of Heidi Pratt. She made her first appearance on The Hills in season four.
She replaced her sister and brother-in-law, Spencer Pratt, during the second season of the NBC reality series I'm a Celebrity Get Me Out of Here! While on the show, she developed a close relationship with former American Idol contestant Sanjaya Malakar. Montag denied reports that she was dating Malakar and insisted they were just close friends.
She continues to appear on The Hills alongside Heidi and Spencer, where she is currently battling a drinking problem.