Desiderio was born in Independence Township, New Jersey, on August 22, 2000, to Dominick and Carol (née Noll) Desiderio. She has an older brother, Dominick, who is two years older than her, and was a baseball player. She graduated high school a year early.[3] Desiderio started the sport at Giant Gymnastics in Hackettstown, New Jersey, and trained at the club until 2010.[4]
Desiderio moved up to Level 10 for the 2012 season. Throughout the season, she placed second in the all-around at States, as well as winning three individual titles.[6] At Regionals, she tied for sixth in the all-around and was the beam and vault champion.[7] She advanced to J.O.Nationals and was fifty-fourth in the Junior A division.[8]
In 2013, Desiderio competed at States only; winning the vault and floor titles as well as finishing fourth in the all-around.[9]
In June, she participated in a National Elite Qualifier and achieved Junior International Elite status.[10]
She competed at the American Classic at the Karolyi Ranch and was eighth overall.[11]
At the U.S. Classic, Desiderio finished tenth in the all-around competition.[12] She competed at Nationals; finishing thirteenth in the all-around.[13]
Desiderio competed as an elite throughout the whole 2014 season. She requalified to elite status at the 2014 National Elite Qualifier in San Diego; despite already being qualified.[14]
At the 2014 U.S. Classic, she placed eighth in the all-around.[15] She was eighteenth in the all-around at Nationals, after a tough competition.[16] Desiderio started the 2015 season at the U.S. Classic, where she placed tenth in the all-around and was second on floor.[17]
On October 7, 2015, she announced her verbal commitment to the LSU Lady Tigers gymnastics program[18] – starting from the 2018–19 academic year.[19]
Senior International Elite
In 2016, Desiderio was named to the National Team and invited to compete for a place on the Olympic Team at the 2016 Summer Olympics trials.