His sister, Michelle Casey, was in an episode of "7th Heaven" (1996) with him ("With a Little Help From My Friends").

Brother Killian is autistic, which is why David is a devoted member and spokesperson of the organization C.A.N (Cure Autism Now)

Parents: Vince and Elena

Graduated from the University of Southern California [May 2007].

His father is from an Irish background and his mother is Cuban.

Has a thing for American made muscle cars, of which he has 6.

David has 2 younger brothers, Killian and Kyle Casey and 2 younger sisters, Michelle Casey and Kelly Casey.