MasterChef Junior US is a 2015 English-language Family series. 24 of the best junior home cooks in the country between the ages of eight and 13 will compete in the first audition round and present their dishes to the judges. Masterchef junior us features Christina Tosi in the lead role along with Elliot Graham, Charlie Ryan, Gordon Ramsay, Jackie Hoffman and Sean Leo in supporting roles. 24 of the best junior home cooks in the country between the ages of eight and 13 will compete in the first audition round and present their dishes to the judges.