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.

Upon signing with Hollywood Records, Duff began working on the 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. Duff began to expand her career into theatrical films.She continued to have success in music, with her albums Hilary Duff (2004) and Most Wanted (2005) achieving Platinum status in the United States. Following the release of her fourth studio album, Dignity (2007), Duff released a greatest hits album (2008) and parted ways with Hollywood Records. She returned to music in 2014, and signed with RCA Records for her fifth album, Breathe In. Breathe Out. (2015).

Duff has worked with numerous charities and organizations throughout her career.