User: Can you give me the biography of Lia Cirio
Assistant: Lia Cirio is an American ballet dancer. She is a principal dancer at Boston Ballet. 

Cirio is half Filipino. She trained at Swarthmore Ballet Theatre and Central Pennsylvania Youth Ballet. At age 16, she joined Boston Ballet II. She joined the main company's corps de ballet in 2004, at age 16, and was the company's Princess Grace Award nominee the same year. Cirio was named second soloist in 2006 and soloist the following year. In 2008 and 2009, Cirio joined the Trey McIntyre Project, and toured with the company in the United States and the world. She returned to Boston Ballet in the 2009-10 season and was promoted to principal in 2010. She has danced roles such as Odette/Odile in Swan Lake and the title role in Cinderella.

Cirio has also choreographed work for Boston Ballet's ChoreograpHER initiative.

Cirio is the older sister of Jeffrey Cirio, a Lead Principal Dancer at English National Ballet. They have established an artistic collective called Cirio Collective in 2015.