Brianna Monique Garcia-Colace was born in San Diego, California, and raised on a farm in the Phoenix suburb of Scottsdale, Arizona. She was born sixteen minutes after her twin sister, Nicole, to parents Jon Garcia and Kathy Colace. She is of Mexican and Italian descent. Keen soccer enthusiasts, she along with her sister played for the Scottsdale club in elementary school. She graduated from Chaparral High School in 2002. She then returned to San Diego for college, and relocated to Los Angeles a year later, where she worked as a waitress at the Mondrian Hotel while trying to find an agent.

She then started modeling, acting, and doing promotional work. She made her first national TV appearance on the Fox reality show Meet My Folks. Following this appearance, the Garcia twins were hired to be the World Cup Twins for Budweiser and were photographed holding the World Cup trophy. Brie and her sister Nikki were contestants in the 2006 “International Body Doubles twins search”. Brie and Nikki later participated in the 2006 WWE Diva Search, but they did not make the cut.

Brianna and Nicole were signed to developmental contracts by World Wrestling Entertainment (WWE) in June 2007 and were assigned to Florida Championship Wrestling (FCW), WWE’s then-developmental territory, in Tampa, Florida. On September 15, 2007, the twins made their in-ring debut. Dubbed The Bella Twins, they defeated Nattie Neidhart and Krissy Vaine with Victoria Crawford as the special guest referee. The duo quickly started a scripted rivalry with Neidhart and Crawford, and had a series of matches against them throughout October 2007. As a part of their on-screen personas, they switched places behind the referee’s back if one of them was hurt. They also occasionally competed in mixed tag team matches, teaming with male wrestlers including Kofi Kingston and Robert Anthony. They also made some non-wrestling appearances on Heath Miller’s Happy Hour promo segment.

Starting in December 2007, they managed Derrick Linkin, but this storyline was cut short when Linkin was released in January 2008. They then resumed their feud with Neidhart and Crawford, wrestling them throughout much of 2008. After Neidhart was called up to the WWE roster in April 2008, Milena Roucka took her place in the feud. The twins also competed in bikini contests, and wrestled against other competitors including Katie Lea Burchill and Daisy. Their last FCW appearance was on September 2, when they competed in a Divas battle royal won by Miss Angela.

Starting in November, the twins developed an on-screen relationship with The Colóns (Carlito and Primo), appearing in numerous backstage segments with them, and accompanying them to the ring. In February 2009, the storyline expanded to include John Morrison and The Miz, who flirted with the Bellas and took them on a date for Valentine’s Day. The date provoked a rivalry between the teams of The Miz and Morrison and Primo and Carlito, with the four competing for the affection of the twins, who were seemingly unable to choose between them. On March 17 on ECW, Carlito and Primo, aiming for Morrison and The Miz, accidentally spat apples in the face of Brie. Nikki began to laugh at Brie’s misfortune, and a fight broke out between the two, which led to Nikki leaving with The Miz and Morrison, while Brie stayed with Primo and Carlito. Brie won her first match over Nikki in a six-person intergender tag team match on SmackDown the following week, but was defeated by her villainous sister in their first singles match against each other on the edition of March 31 of ECW, after a distraction from Morrison and The Miz.

On April 15, 2009, The Bella Twins were both drafted to the Raw brand as part of the 2009 supplemental draft. On April 27, Brie made her Raw in-ring debut in an eight-Diva tag team match, which her team won. Nikki also made an appearance, reuniting with her twin, as she was under the ring to help Brie during the match. Nikki then made her in-ring debut for the brand the following month in a battle royal but was eliminated by Beth Phoenix.

On June 29, 2009, they were both traded to the ECW brand. They returned to ECW the following night on The Abraham Washington Show, as the special guests. They quickly developed a storyline feud with Katie Lea Burchill, when Nikki defeated her in a match by switching places with Brie behind the referee’s back. The following week on Superstars, Brie defeated Burchill after a similar fashion, and the feud ended in September, when Nikki defeated Burchill on Superstars.

On October 12, the Bellas were traded back to Raw as part of a tri-branded Divas trade, where they predominately appeared in backstage segments with the weekly guest stars and only occasionally competed in matches. On the January 4, 2010, episode of Raw, Brie participated in a tournament for the vacant Divas Championship, but lost to Maryse in the first round, when a switch resulted in Nikki being pinned. In June 2010, they developed a feud with Jillian Hall, when Brie defeated her after switching places with Nikki. The following week, Nikki defeated Hall after switching with Brie. The feud was exacerbated when the Bellas acted as the special guest referees during one of Hall’s matches. During the match, Hall attacked both twins, but lost the match when Nikki made a fast count, allowing her to be pinned by Gail Kim. The next week on Superstars, the twins defeated Hall and Maryse in a tag team match to end the storyline.

On August 31, The Bella Twins announced they would be part of the all-female third season of NXT, mentoring Jamie. Jamie was the first rookie Diva eliminated on the October 5 episode of NXT. In November, the twins began a storyline with Daniel Bryan, when Brie accompanied him to the ring for his match. Following his win, Nikki ran out and the two fought over Bryan’s affection, until Bryan broke it up and had them hug each other. They began to manage Bryan and frequently accompanied him to the ring over the next two months. In January 2011, both Bellas turned into villainous characters when they discovered Bryan kissing Gail Kim backstage and assaulted her. They continued to attack Kim, both at the Royal Rumble and on Raw, and on February 7, they teamed with Melina in a losing effort to Kim, Eve Torres, and Tamina.

The twins spent the majority of the rest of the year in tag team matches, regularly facing Kelly and Torres. The Bellas began to show friction for the second time since joining WWE in March 2012, after both twins lost to AJ Lee in singles competition. After Brie’s match with Lee, Nikki revealed that Brie was rooting for Team Johnny in the 12-man tag team match at WrestleMania XXVIII, whilst Nikki was rooting for Team Teddy, thus furthering their dissension.

On May 1, 2012, the twins appeared at their first independent wrestling show in Newburgh, New York at Northeast Wrestling. They later appeared for CTWE Pro Wrestling at the Season Beatings pay-per-view on December 15, each accompanying a different wrestler to the ring.

In September 2013, she revealed her engagement to fellow professional wrestler Bryan Danielson, better known as Daniel Bryan. The couple married on April 11, 2014. Brie and her husband are both vegetarians.

In April 2014, Brie became involved in her real-life husband Daniel Bryan’s ongoing storyline with Stephanie McMahon and Kane, where as part of the storyline, McMahon threatened to fire Brie if an injured Bryan did not relinquish the WWE World Heavyweight Championship at Payback, which forced Brie to “quit” WWE before slapping McMahon in the face. After Brie quit, McMahon put Nikki in several handicap matches as punishment. After a month absence, Brie returned to WWE television, appearing in the crowd on July 21; following a confrontation, McMahon slapped Brie and was subsequently arrested. In order to have Brie drop the “charges”, Brie was rehired and received a match against McMahon at SummerSlam.

Prior to working with WWE, the twins appeared on Meet My Folks. Both twins also appeared in the music video for “Right Side of the Bed” by the band Atreyu. They also appeared in the music video for “Na Na” by Trey Songz in 2014. The twins made a guest appearance on the MTV series Ridiculousness in October 2012.

The twins guest starred on the television series Psych, in the 2014 episode “A Nightmare on State Street”. Nikki and Brie are part of the main cast for the reality television show Total Divas, which began airing in July 2013, and they also star in their own spinoff entitled Total Bellas, which premiered on E! on October 5, 2016. Nikki and Brie co-starred in the 2014 independent film Confessions of a Womanizer, and provided voices for the 2015 movie The Flintstones & WWE: Stone Age SmackDown!. Both twins appeared on the WWE YouTube show The JBL & Cole Show. Nikki appeared at the Miss USA 2013 pageant as one of the celebrity judges. They appeared at the 2014 MTV Europe Music Awards, where they presented the award for Best Female. The twins were both nominated for Choice Female Athlete at the 2015 Teen Choice Awards. Brie appeared alongside Paige, Natalya and the Chrisley family on the 88th Academy Awards edition of E! Countdown to the Red Carpet in February 2016. In 2016, Brie and Nikki were voted as Choice Female Athletes for the 2016 Teen Choice Awards.

Nikki received her title match against AJ Lee on November 23 at Survivor Series, which she won, with Brie’s help, to become a two-time Divas Champion. The duo had reconciled at this point, with Brie also turning heel in the process. Nikki then went on to retain her championship in three separate occasions – against Lee in a rematch on December 14, at TLC: Tables, Ladders and Chairs, against Naomi two days later on SmackDown, and against Paige at Fastlane on February 22, 2015. Paige and AJ then formed an alliance against the Bellas which led to a tag team match at WrestleMania 31, where AJ and Paige were victorious.

On November 21, 2016, Brie and Nikki unveiled their new YouTube channel, “The Bella Twins.” The sisters’ channel features daily fashion, beauty, travel, fitness, relationship, and health videos, along with daily video blogs, created by the twins themselves.

On October 5, 2016, Brie announced that the couple were expecting their first child. Brie gave birth to a girl named Birdie Joe Danielson on May 9, 2017. On January 29, 2020, Brie announced that she was expecting her second child along with her twin sister, who also announced her pregnancy the same day. Brie gave birth to a boy named Buddy Dessert Danielson on August 1, 2020.

The Bella Twins appeared in YouTuber iiSuperwomanii’s video “When Someone Tries to Steal Your BFF” on March 2, 2017.

On August 21, 2017, Brie and Nikki launched their own wine label called Belle Radici in collaboration with Hill Family Estates and Gauge Branding.

On November 1, 2017, Brie and Nikki launched Birdiebee, a lifestyle intimates and activewear brand. The line includes transitional intimates, activewear, and loungewear aimed at “empowering and educating women through mirroring the twins’ passion for life, strength, women’s health and wellness, and fun.”

The Bella Twins returned for the 25th anniversary of Raw on January 22, 2018. Brie later returned to in-ring competition at Royal Rumble, entering at number 28 in the inaugural women’s Royal Rumble match, one number after her sister Nikki, who would eliminate her from the match minutes later.

On January 28, 2019, Brie and Nikki launched Nicole + Brizee, a body and beauty line.

On March 27, 2019, Brie and Nikki launched their own podcast.