The ninth season of the American competitive reality television series MasterChef Junior premiered on Fox on March 4, 2024. Gordon Ramsay, Aarón Sanchez, and Daphne Oz all returned as judges, while Tilly Ramsay joined as a new judge. The season was won by Bryson McGlynn, an 11-year-old from Opelika, Alabama, with Michael Seegobin from New Smyrna Beach, Florida and Remy Powell from Hollywood, Florida being the runners-up.
On December 20, 2022, the initial casting announcement for a potential ninth season was posted. The casting notice was re-posted on September 8, 2023 on the show's Twitter page. On October 12, 2023, it was announced that the series had been renewed for a ninth season, with Ramsay, Sánchez, and Oz as returning judges, along with new judge Tilly Ramsay. On December 13, 2023, it was announced that the season would premiere on March 4, 2024. On February 21, 2024, the 12 new contestants were announced. This number of contestants marks the fewest competitors in a regular season since the first season.
Sources for age, first name and hometown: