When Rebecca was about five years old, her parents put her in a gymnastics summer camp for fun and she could not wait until the next year to go to the camp again. After the second year of summer camp, she began taking gymnastics classes at G.T.C in Rochester, Michigan. In 2001, she was a member of the TOPs Gold Level National Team. During Rebecca's level 7 season, she and her family moved to Texas, where Rebecca began training at the world reknowned World Olympic Gymnastics Academy (WOGA) in Plano, TX.

In 2003, Rebecca competed at the IG Hall of Fame meet where she placed first on vault, balance beam, and 11th in the all around. In the January of 2004, she began competing as a level 8 at the WOGA Classic, where she placed 4th all around as well as second place on vault and third place on uneven bars. At the Level 8 State Championships, Rebecca placed first in the all around and on vault. A few weeks later, Rebecca followed up the this showing with a 4th place all around finish, along with a first place showing on vault and uneven bars at the Level 8 Regional Championships.

As a level 9 in 2005, Rebecca made a very impressive showing at the WOGA Classic, where she placed first in the all around. She then competed as a level 10 at the Texas State Championships, where she placed first on all events except for floor exercise and finished second in the all around. In April, Rebecca competed at the Level 10 Regional Championships placing first in the all around as well as first on balance beam and floor exercise. This advanced Rebecca to the Junior Olympic National Championships. At the JO Nationals, Rebecca finished fifth in the all around with a 37.325. She also finished first on balance beam with a 9.600.

Not long after competing at the JO Nationals, Rebecca tested at Krafft Academy, where she successfully qualified to junior international elite. Soon ater, she competed at the US Classic, where she placed 17th in the all around and 4th on vault. There, Rebecca qualified to the US National championships in Indianapolis. On the first day of the US Nationals, Rebecca placed 18th in the all-around with a sixth place finish on vault. On the second day of the US Nationals, Rebecca placed 19th in the all around with another high finish on vault. After both days, Rebecca's combined score was a 67.830, which placed Rebecca 16th in the all-around. Therefore, she took the last spot on the Junior US National Team. She turned many heads and gained lots of fans, with her bold style and big skills.

Rebecca started the 2006 season at the WOGA Classic, where she placed 5th in the all around, 2nd on vault and 3rd on balance beam. In April, Rebecca was chosen along with 3 other US National Team Members to represent the USA Team at the Pacific Alliance Championships. At the Pacific Alliance Championships, Rebecca placed 4th in the all around and 5th on balance beam. She qualified to the beam event finals, where she finished 5th. At the VISA Championships in St. Paul, Minnesota, Rebecca placed very impressive 4th in the all-around, 2nd on balance beam, and 8th on vault in a very tough group of competitors. Her 4th place at the VISA Championships qualified her to compete for the USA at the Pan American Games, where she earned a gold medal with her team. She also placed 5th in all-around and 1st on vault.

In 2007, Rebecca finished third on uneven bars at the WOGA Classic. Her next meet was the American Classic at the National Team Training Center, where Rebecca finished second in the all-around. After another training camp and competition, she was selected for the Pan American Games Team in Brazil. Rebecca qualified for the uneven bars, balance beam, floor exercise and all-around finals. Due to two-per-country rules, she could only compete in floor exercise and all-around finals. She helped the USA Team to a gold medal finish. In the all-around, Rebecca finished second to Shawn Johnson. She came back in event finals to win the floor exercise title. After a month of no competitions, Rebecca competed at the VISA Championships in San Jose, California. Despite a fall on uneven bars in day one and balance beam in day two, Rebecca still cruised to an all-around win. She also won vault, uneven bars and floor exercise titles. Her only second place finish came on balance beam. She concluded her season with the Japan Junior International, where she finished first in the all-around. She went on to sweep the gold medals in the event finals.

Rebecca started off her 2008 season at the WOGA Classic, where she won the all-around title. She then went on to yet another international assignment to Italy, where she placed second in the all-around in the junior division. Later, she had the opportunity to compete in the 2008 Pacific Rim Championships. Rebecca did an outstanding job, winning gold medals in the all-around, balance beam, uneven bars and floor exercise event finals as well as helping USA to win the team gold. Rebecca was about to defend her National title until when she broke her foot and was unable to compete at the 2008 US Junior National Championships. Rebecca was named to the 2008 Pan-Am Individual Event Championships team, but had to pull out at the last moment with a knee injury.

In July 2009, Rebecca finally came back to the competition at the US Classic in Des Moines. Unfortunately, Rebecca injured her ankle during the training and only did uneven bars. A few weeks later, Rebecca competed in the all-around for the first in in over a year at the VISA Championships in Dallas, Texas. Rebecca was in the first place after the first day of the VISA Championships. On the second day, Rebecca did not have her best meet and finished third in the all-around. She, along the Senior US National Team Members, qualified to the World Selection Camp.

In October, Rebecca was selected to represent the USA team at the World Championships in London, England. On the first day of the World Championships in London, England, Rebecca qualified to three finals; all-around, uneven bars and floor exercise, where she placed first, second and eighth respectively. On the day of the all-around final, Rebecca started off strong until her last event on floor exercise, where she fell on her last pass. She ended up second in the all-around right behind USA teammate, Sridget Sloan. Rebecca won another medal during the event finals, a bronze medal on uneven bars.

In 2010, Rebecca Bross and USA teammate, Alexandra Raisman, were selected to represent USA team at the American Cup in Worcester, Mass. Rebecca won the all-around title with Alexandra Raisman second and Venezuela's Jessica Lopez third. Rebecca won three gold medals on uneven bars, balance beam and floor exercise. At the end of April, Rebecca traveled to Melbourne, Australia for the Pacific Rim Championships. On the first day of competition, Rebecca won the senior all-around title and finished first on uneven bars and floor exercise. In addition, she helped the USA team to win gold ahead of China and Russia. At the US Covergirl Classic in Chicago, IL, she won the uneven bars title. She then traveled to the VISA Championships in August in Hartfort, CT. There, she won the all-around title in the senior division. She also won two gold medals on uneven bars and balance beam and a silver medal on floor exercise. A few weeks later, she was selected to represent the USA team at the World Championships in Netherlands. She helped the USA team to win the team silver medal right behind Russia with China third. During the all-around and event finals, she placed third in the all-around, third on uneven bars and second on balance beam.

Rebecca Marie Bross was born on July 11, 1993 in Ann Arbor, Michigan. She is the youngest of two children to Donna and Terry Bross. Currently, Rebecca is a senior international elite gymnast training at WOGA under coach Valeri Liukin.