Carradine was born in San Mateo, California. He is the son of actress and artist Sonia Sorel (née Henius), and actor John Carradine. His full brothers are Christopher and Robert Carradine, both of whom are actors. His paternal half-brothers are Bruce and David Carradine. His maternal half-brother is Michael Bowen. His maternal great-grandfather was biochemist Max Henius, and his maternal great-grandmother was the sister of historian Johan Ludvig Heiberg.
