Mulhern gained his interest in comedy and magic from his father, who taught him tricks when he was 11 years old. The family spent their holidays at Butlin's Minehead in Somerset, where Mulhern began performing in public. He became the youngest member of The Magic Circle, which brought about an appearance on "Blue Peter" in a piece about Harry Houdini. Mulhern was later suspended from The Magic Circle for revealing a magic trick on "Finger Tips", a children's TV show. The suspension was eventually lifted.