Vivian Nixon

Vivian Nichole Nixon is an American actress and the voice actress of Millie in the main series, replacing Erica Lindbeck.

Background
She worked in Grey's Anatomy, (500) Days of Summer, Top Five, and Hubie Halloween.

Trivia

 * Alongside her audition for Millie, she also auditioned for one of the Cherubs. Though, she never mentioned which one.