He is played by Riccardo Frascari, who is from Italy in real life. Riccardo also voices JJ in the Italian dub.
JJ is from the year 1957. He is affectionate, funny and confident. JJ was Vero's boyfriend before falling in love with Eva. With Eva's help, JJ learns to follow his dreams of becoming a singer and dancer at Club 57. He is also a member of his school's basketball team, where he often finds himself bickering with his rival, Andrés.