In " Alvin and the Chipmunks: The Squeakquel " the Chipettes are voiced by Christina Applegate as Brittany , Anna Faris as Jeanette and Amy Poehler as Eleanor .
Jesse McCartney provides the voice for Theodore in "Alvin and the Chipmunks: The Squeakquel" .
The voice of Eleanor is by Amy Poehler.
Matthew Gray Gubler provides the voice of Simon Seville in "Alvin and the Chipmunks: The Squeakquel" .
Jason Lee of the sit-com My Name Is Earl plays David Seville in the Alvin & The Chipmunks movie.
Anna Faris provides the voice Jeanette .
Jesse McCartney plays the voice of Theodore.
Jesse McCartney as theodores voice
Justin Long .
Ross Bagdasarian, Jr. was the creator and first to voice Alvin and the Chipmunks.
Justin Long .
In the new 2007 movie, Jesse McCartney is the speaking voice of Theodore, and Janice Karman is the singing voice.
No, he plays the voice of Theordore in Alvin and The Chipmunks, he just isn't makin anymore music.