Finneas Baird O'Connell, known mononymously by his first name, is an American singer-songwriter, record producer, and actor. He has written and produced music for various artists, including his sister, Billie Eilish. He has won eight Grammy Awards, including Album of the Year, Producer of the Year, Non-Classical and the Best Engineered Album, Non-Classical for his work on Eilish's debut album When We All Fall Asleep, Where Do We Go?.
Finneas has released several singles as a solo artist, and his debut EP, Blood Harmony, was released in October 2019. The EP includes "Let's Fall in Love for the Night", his most successful song to date, peaking at number 17 on the US Billboard Alternative Songs chart. His debut studio album Optimist was released through Interscope Records on October 15, 2021.
Finneas starred in the 2013 independent film Life Inside Out. He is also known for his role as Alistair in the Fox musical comedy-drama series Glee. He also made an appearance on the American sitcom Modern Family.