Chloë Agnew is an Irish singer who has gained fame for her part in the Celtic music group Celtic Woman as the youngest member. She comes from Knocklyon, County Dublin, Ireland, where she resided with her mother Adéle "Twink" King and younger sister Naomi Agnew. She attends Alexandra College girls school. She sings in a few languages: English, Gaelic, Latin and Italian.

Agnew was born to Irish entertainer Adéle "Twink" King and Irish oboist David Agnew. She made her first television appearance on her mother's program at just four weeks old, and subsequently sang on the show at the age of six.

In 1998, Agnew represented Ireland and was the winner of the Grand Prix at the First International Children's Song Competition in Cairo, Egypt, with a song called "The Friendship Tree". She then began to perform pantomime at the Olympia Theatre in Dublin and continued in that role for four years.

In 1999, she appeared in The Young Messiah, a modern adaptation of Handel's Messiah. In this production, she played one of the children and performed sign language.

In 2000, at age 11, Agnew approached director David Downes about recording a song to raise money for the children of Afghanistan. With his assistance, she recorded "Angel of Mercy" for the album This Holy Christmas Night, which raised over GB£20,000 for the Afghan Children's Charity Fund in 2001. That same year, she joined the Christ Church Cathedral Girls' Choir, and remained a member for three years.

In 2002, at 12 years of age, Agnew was signed to Celtic Collections, and with the backing of Downes she recorded her debut album Chloë. Two years later, in 2004, she followed this with her second album, Chloë: Walking in the Air. That same year, she appeared as part of the group Celtic Woman at The Helix in Dublin. To date, she has recorded three albums with the group and has taken part in several world tours. She has also recorded a companion DVD released in 2004 in Europe and 2007 in North America to go with her second album. In 2009, she will be a lead vocalist for Celtic Woman in the upcoming Isle of Hope tour.