I noted right away that the voice of Violet, the invisigirl-style teenaged daughter, didn't sound like a cartoon voice. She was very good, mind you, and definitely right for the role, but she didn't even really sound like an actor. Turns out -- the voice was that of This American Life alumni Sarah Vowell. For as much of a cult following as Vowell has, there's been little fanfare about her acting debut - but she's done a couple of interviews. The difference is, when you listen to her on TAL, you kinda think, "she sounds like a cartoon character". She has a childish, sing-songy voice on the high end of her register, sounding much, much younger than you'd expect. From her history, as outcast, uncomfortable child -- to published writer, cartoon character, media expert with an audience crossing many, many lines, she's a superhero on the scale of us lost, loser geeks.