Made her acting debut with the Columbus Ballet Met production of "The Nutcracker"

Cast as Wendy, the friendly ghost's best friend in the successful video release "Casper Meets Wendy"

Co-starred in the television feature "Soul Collector"

Break-out role as Lizzie in the Disney Channel's original series "Lizzie McGuire"

Starred in the Disney original movie "Cadet Kelly"

Portrayed the love interest to Frankie Muniz's character in "Agent Cody Banks"

Starred in the "The Lizzie McGuire Movie"

Played one of Steve Martin's twelve children in the comedy "Cheaper by the Dozen"

Released debut album, "Metamorphosis"

Starred in the modern day version of "A Cinderella Story"

Cast as an aspiring songwriter in "Raise Your Voice" opposite John Corbett

Released sophmore album, "Hilary Duff"

Played a teenager seeking the perfect partner for her single mom (Heather Locklear) in "The Perfect Man"

Reprised her role as one of twelve children in the comedy "Cheaper by the Dozen 2"

Co-starred with real life sister, Haylie Duff as a pair of cosmetics heiress who lose their fortune in the comedy "Material Girls"

Released third studio album, Dignity

Co-starred with Steve Coogan in the independent comedy, "What Goes Up"

Will join "Gossip Girl" (CW) for a multi-episode arc, as Olivia Burke, a movie star who enrolls at NYU