Holly Holm was born on October 17, 1981.
Holly Holm graduated from Manzano High School in 2000, shortly after her parents divorced. She then attended the University of New Mexico for a year.
In September 2001, Holly Holm won the championship title in the International Rules Adult Women's Welterweight Division at the International Kickboxing Federation (IKF) USA National Amateur Championship Tournament in Kansas City, Missouri.
Holly Holm was named Ring Magazine's Fighter of the Year for the first time in 2005.
Holly Holm was named Ring Magazine's Fighter of the Year in 2005.
Holly Holm received the Ring Magazine's Fighter of the Year award for the second time in 2006.
Holly Holm was awarded the Ring Magazine's Fighter of the Year award for a second consecutive year in 2006.
In June 2008, Holly Holm defeated Mary Jo Sanders to become the undisputed welterweight champion, holding belts from 140 to 154 pounds.
Holly Holm had a rematch with Mary Jo Sanders on October 17, 2008, at the Palace of Auburn Hills, which resulted in a draw.
Holly Holm made her mixed martial arts debut on March 4, 2011, defeating Christina Domke via TKO in the second round.
On September 9, 2011, Holly Holm secured a victory against Jan Finney via TKO in the third round at Fresquez Productions: Clash in the Cage.
On December 2, 2011, Holly Holm faced Anne Sophie Mathis for the vacant IBA and WBAN welterweight titles but lost by knockout in the 7th round.
Holly Holm avenged her previous loss by defeating Anne Sophie Mathis on June 15, 2012, to claim the WBF, IBA, and WBAN welterweight titles.
Holly Holm married Jeff Kirkpatrick, whom she met in college, in 2012.
Holly Holm made her Bellator MMA debut on February 28, 2013, at Bellator 91, defeating Katie Merrill via TKO in the second round.
Holly Holm announced her retirement from boxing after her victory over Mary McGee on May 11, 2013, to focus on her MMA career.
Holly Holm defeated Allanna Jones via head-kick knockout in the second round at Legacy Fighting Championship 21 on July 19, 2013.
On October 11, 2013, Holly Holm won against Nikki Knudsen at Legacy Fighting Championship 24 via TKO in the second round.
Holly Holm defeated Angela Hayes via unanimous decision at Fresquez Productions: Havoc on December 6, 2013.
On April 4, 2014, Holly Holm won the inaugural Legacy FC Women's Bantamweight Championship by defeating Juliana Werner via TKO in the fifth round.
Holly Holm signed a multi-fight deal with the Ultimate Fighting Championship (UFC) on July 10, 2014.
Holly Holm secured a victory against Marion Reneau by unanimous decision at UFC Fight Night 71 on July 15, 2015.
On November 14, 2015, Holly Holm defeated Ronda Rousey in a highly anticipated match at UFC 193, ending Rousey's undefeated streak.
On November 15, 2015, Holly Holm achieved a significant victory by defeating Ronda Rousey at UFC 193 to become the UFC Women's Bantamweight Champion.
Holly Holm was initially scheduled to face Ronda Rousey at UFC 195 on January 2, 2016, but the fight was later rescheduled.
Holly Holm lost her bantamweight title to Miesha Tate on March 5, 2016, at UFC 196 via a rear-naked choke submission in the fifth round.
Holly Holm faced Valentina Shevchenko at UFC on Fox 20 on July 23, 2016, and lost the fight by unanimous decision.
In 2016, Holly Holm was photographed by Delilah Montoya for the book "Women Boxers: The New Warriors" and appeared in the film "Fight Valley."
On February 11, 2017, Holly Holm faced Germaine de Randamie for the inaugural UFC Women's Featherweight Championship. Holm lost in a controversial unanimous decision where de Randamie threw punches after the bell in the second and third rounds.
On June 17, 2017, Holly Holm returned to the bantamweight division and won against Bethe Correia via knockout in round three, earning her a Performance of the Night bonus.
Holly Holm challenged Cris Cyborg for the UFC Featherweight Championship at UFC 219 on December 30, 2017. Despite losing via unanimous decision, the bout earned her a Fight of the Night bonus.
Holly Holm fought Megan Anderson at UFC 225 on June 9, 2018, and won by unanimous decision.
On January 31, 2019, it was announced that the bout between Holly Holm and Aspen Ladd, originally scheduled for UFC 235 on March 2, 2019, was canceled.
A planned bout between Holly Holm and Aspen Ladd at UFC 235, initially scheduled for March 2, 2019, was canceled.
On July 6, 2019, at UFC 239, Holly Holm fought Amanda Nunes for the Women's bantamweight championship, losing in the first round via technical knockout.
In July 2019, Holly Holm separated from her husband, Jeff Kirkpatrick.
Holly Holm was scheduled to face Raquel Pennington at UFC 243 on October 6, 2019. However, Holm withdrew due to injury, leading to the bout's cancellation.
Holly Holm fought Raquel Pennington at UFC 246 on January 18, 2020, winning via unanimous decision.
A fight between Holly Holm and Irene Aldana was planned for UFC Fight Night: Brunson vs. Shahbazyan on August 1, 2020, but Aldana withdrew after testing positive for COVID-19, leading to the cancellation of Holm's participation.
On October 4, 2020, Holly Holm won against Irene Aldana via unanimous decision at UFC on ESPN: Holm vs. Aldana.
Holly Holm filed for divorce from Jeff Kirkpatrick and requested to revert to her maiden name in early 2020.
Holly Holm had to pull out of her fight against Julianna Peña at UFC on ESPN 24, scheduled for May 8, 2021, due to hydronephrosis.
Holly Holm withdrew from her scheduled fight against Norma Dumont at UFC Fight Night 195, set for October 16, 2021, due to a knee injury. Aspen Ladd replaced her.
On May 21, 2022, Holly Holm fought Ketlen Vieira at UFC Fight Night 206. Holm lost a controversial split decision, though 18 out of 20 media outlets scored the fight in her favor.
In late 2022, Holly Holm signed a new six-fight contract with the UFC, replacing her previous contract with one fight remaining.
Holly Holm won against Yana Santos at UFC on ESPN 43 on March 25, 2023, via unanimous decision.
Holly Holm faced Mayra Bueno Silva on July 15, 2023, at UFC on ESPN 49, replacing Miesha Tate, who withdrew due to an injury. Holm lost via a controversial ninja choke in round two.
In October 2023, the result of Holly Holm's July 15, 2023, fight against Mayra Bueno Silva was overturned to a No Contest after Bueno Silva tested positive for a banned substance.
On April 13, 2024, at UFC 300, Holly Holm fought Kayla Harrison. Holm lost the fight in the second round due to a rear-naked choke submission.
As of April 16, 2024, Holly Holm is ranked #6 in the UFC women's bantamweight rankings.