Christian and Joseph's first role was playing Val and Gary Ewing's son Bobby Ewing on the soap opera Knots Landing, beginning in 1987. The character was named after Bobby Ewing who died during the dream season on Dallas. Afterwards, they frequently appeared in various television series and films, including Twin Sitters and Critters 3, as well as episodes of Father Dowling Mysteries, Eerie, Indiana, and Wings.
