David Marc Worden attended Churchill Heights Public School in Scarborough, Ontario from grades 4 through 8.
He made his first known stage appearance as Sandy the dog in the school's musical production of Annie in 1986.
Following community theatre performances in the Toronto Civic Light-Opera Company's productions of The King and I and The Wizard of Oz, as well as taking dance and musical theatre classes with Roland and Romaine Studios in Toronto, Worden made film appearances on two episodes of the television series Katts and Dog.
In 1997, Worden appeared in two episodes of Star Trek: Deep Space Nine, the last of four actors to portray Alexander Rozhenko, Worf's son.
In addition to onscreen appearances on film and television, Worden has done extensive voice work on animated series and films, starting with Batman Beyond in 1999, as well as numerous video games, starting with Blade Runner in 1997.