Mathis is 8 years old and comes from Grez-Doiceau. The young boy is passionate about ballet and music. A passion that brought him to the stage of The Voice Kids.

For her audition, Mathis chose a title by the French singer Indila, "Dernier danse".
"There are grown-ups who don't know how to do what you just did," said Slimane, who begged Mathis to join his team.