Duff's success in both acting and music led to her becoming a household name, with merchandise such as dolls, clothing, and fragrances being released.
Duff began to expand her career into theatrical films, with leading roles in projects such as Agent Cody Banks (2003), Cheaper by the Dozen (2003), A Cinderella Story (2004), and Cheaper by the Dozen 2 (2005).
She continued to have success in music, with her albums Hilary Duff (2004) and Most Wanted (2005) achieving Platinum status in the United States.
During this time, she began appearing in independent films such as War, Inc.
(2008), According to Greta (2009), and Bloodworth (2010).
She later released the novel Elixir (2010), which became a New York Times best seller.
Hilary Erhard Duff (born September 28, 1987) is an American actress and singer.
Duff began her acting career at a young age, and quickly became labeled a teen idol as the title character of the Disney Channel comedy series Lizzie Mc Guire (2001–2004).
The series proved to be a hit, leading to a film adaptation of the series to be released.
Duff began working on numerous projects with the Disney Channel, including the film Cadet Kelly (2002).
She later began work on an album, releasing the Christmas themed Santa Claus Lane (2002) through Walt Disney Records.
Upon signing with Hollywood Records, Duff began working on her second studio album, Metamorphosis (2003).
The album achieved critical and commercial success, topping the Billboard 200 and selling over three million copies in the United States alone.
The album also found success in both Canada and Japan.