Zach Mills began his Hollywood tenure with a very prolific career for a child actor; by the age of 12, he had already racked up guest appearances on Malcolm in the Middle, Scrubs, and other series, and a panoply of colorful feature roles. Particularly memorable were his turns in the 2006 holiday comedy The Santa Clause 3 (as an elf), the offbeat 2007 fantasy Mr. Magorium's Wonder Emporium (as Eric Applebaum, the most loyal customer of a magical toy store), and the 2008 family-oriented comedy Kit Kittredge: An American Girl.