Friess was named to the 2019 Worlds Artistic Gymnastics Championships French team alongside Marine Boyer, Lorette Charpy, Melanie de Jesus dos Santos, and Claire Pontlevoy. On October 4, 2019, she competed in team qualifications on all four events, earning 15.000 on vault, 13.566 on uneven bars, 12.700 on balance beam, and 12.733 on floor exercise, totaling a 53.799 all around. On October 8, 2019, Aline Friess competed in the Team Final, helping France to a 5th-place team finish with her scores of 14.900 on Vault and 13.300 on Floor. Aline's 14.900 was the 3rd highest score out of all vault competitors, with American gymnasts, Simone Biles and Jade Carey being the only competitors scoring higher than her. On October 11th, Friess competed in the All-Around final at World Championships. She scored 14.966 on vault, 13.600 on bars, 13.066 on beam, and 13.166 on floor for an all around total of 54.798. This earned her 11th overall and becomes her highest all-around score of her senior and junior career. Her 14.966 on Vault was the 2nd-highest score on the event, being outscored only by American gymnast, Simone Biles.