Cellier was born into a family of actors including his father Frank and half-sister Antoinette . His grandfather was the Gilbert and Sullivan conductor François Cellier . He was born into a family of actors , including his father Frank and half-sister Antoinette , his grandfather was the Gilbert and Sullivan conductor François Cellier .
Cellier dilahirkan dalam keluarga pelakon termasuk bapanya Frank dan adik tiri Antoinette. Datuknya adalah konduktor Gilbert dan Sullivan Franois Cellier. Beliau dilahirkan dalam keluarga pelakon, termasuk bapanya Frank dan adik tiri Antoinette, datuknya adalah Gilbert dan Sullivan konduktor Franois Cellier.