Holly Rene Holm-Kirkpatrick is an American mixed martial artist who competes in the Ultimate Fighting Championship. She is the former UFC Women's Bantamweight Champion, and a former professional boxer and kickboxer. She was a multiple-time world champion in boxing, defending her titles 18 times in three weight classes, and a two-time Ring magazine fighter of the year (2005, 2006). She's ranked by BoxRec as the second-best female professional boxer of all time.