Main •
Shane Harte as Luke, lead singer and guitarist for the band Lost & Found, and a songwriter • Alex Zaichkowski as John, the lead guitarist of Lost & Found, and a songwriter •
Keara Graves as Leia, a singer-songwriter who has been with the program for two years, she views herself as the best songwriter in the program. She has a crush on Luke. • Sarah Carmosino as Rachel, a singer and songwriter with self-confidence issues, and Leia's best friend • Levi Randall as Theo, the quirky bassist of the Lost & Found band • Deshaun Clarke as Jude, a confident rapper • Ella Jonas Farlinger as Eva, a shy singer and songwriter with strict parents • Katrina Hachey as Hannah, a singer and guitarist • Ali Milner as Parker, the studio manager at Lost & Found Music Studios •
Michael Torontow as Mr. T, a music producer and the owner of the Lost & Found Music Studios • Rakim Kelly as Isaac, a young singer from a tough neighborhood who auditions to join the Lost & Found music program • Olivia Solo as Annabelle, a nervous singer-songwriter who auditions to join the Lost & Found music program but blows her audition when she learns the wrong song • Matthew Bacik as Nate, a singer and keyboardist with an oppressive stage mother who auditions to join the Lost & Found music program • Maranda Thomas as Mary, Jackie's older sister, and a singer who auditions to get into the Lost & Found music program • Alyssa Baker as Maggie, a musician and singer-songwriter from a small town who auditions to join the Lost & Found music program • Jeni Ross as Clara, a young singer, Giselle's sister, who auditions to join the Lost & Found music program
Recurring • Victoria Baldesarra as Michelle, a dancer at The Next Step • Trevor Tordjman as James, a former dancer with
The Next Step and a drummer for the Lost & Found band, though he is not in the music program •
Brittany Raymond as Riley, a dancer at The Next Step •
Jordan Clark as Giselle, a dancer at The Next Step • Kathryn Greco as Patricia, the manageress of Java Junction • Ian Matthews as Thomas, John's imposing widower father •
Lovell Adams-Gray as Tully, Isaac's older brother, who runs with a bad crew, and is also known as the musical act Paradox • Bailey Pelkman as Britney, a singer who is auditioning for the second year in a row to get into the Lost & Found music program • Lauren Thomas as Jackie, Mary's younger sister
Guest stars •
Tyler Shaw as himself (in "Dancing in the Rain") •
Brenda Bazinet as Ruth, John's grandmother (in "Callin' Callin' Part 2", "The Sound of Change") • Kerri Smith as Connie, Eva's strict mother (in "Rhythm Is My Heartbeat", "Wondering", "You Could Have It All") ==Episodes==