Christine Cavanaugh. Christine Cavanaugh was 32 in Dexter's Laboratory: The Big Sister as 'Dexter (voice)'.
Allison Moore. Allison Moore was >> in Dexter's Laboratory: The Big Sister as 'Dee Dee (voice)'.
Kath Soucie. Kath Soucie was 29 in Dexter's Laboratory: The Big Sister as 'Mom / Ms. Physics (voice)'.
Jeff Bennett. Jeff Bennett was 33 in Dexter's Laboratory: The Big Sister as 'Professor / Cop / Anchor Man / Man #1 (voice)'.
Frank Welker. Frank Welker was 49 in Dexter's Laboratory: The Big Sister as 'President / General / Guy / Man #2 / Einstein (voice)'.
Genndy Tartakovsky. Genndy Tartakovsky was 26 in Dexter's Laboratory: The Big Sister as 'Director, Writer'
Craig McCracken. Craig McCracken was 24 in Dexter's Laboratory: The Big Sister as 'Art Direction'
Paul Rudish. Paul Rudish was 27 in Dexter's Laboratory: The Big Sister as 'Art Direction'
Mike Moon. Mike Moon was >> in Dexter's Laboratory: The Big Sister as 'Background Designer'