The following month, the Parsons would win their first junior national title at the 2017 U.S. Championships, over 11 points clear of the field. The siblings would cap off their undefeated season by winning the 2017 World Junior Championships; similar to the 2016–17 JGP Final, the Parsons won the event overall after placing second in the short and first in the free, earning an even narrower victory of 0.56 ahead of Loboda/Drozd. The Parsons earned personal bests in their combined total and free dance scores at their fifth trip to the Junior Championships.