Ashlee Simpson (born October 3, 1984) is an American pop rock singer, songwriter, and actress. She is the younger sister of pop singer Jessica Simpson. Ashlee started dancing at the age of 4 and by the time she was 11 enjoyed the status of being the youngest person ever admitted to the prestigious School of American Ballet. In 1999, when she was 14 years old, she moved to Los Angeles with her family for her sister's career and instantly began her own career by working as a backup dancer for Jessica.