Finneas Baird O'Connell (born July 30, 1997),[2] also known mononymously by his first name, sometimes stylized in all caps,[3][4] is an American singer-songwriter, record producer, and actor.

The recipient of numerous accolades, he has written and produced music for various artists, most notably for his younger sister, Billie Eilish.

[7] He has also worked with other high-profile artists, including Drake, Kid Cudi, Nicki Minaj, Selena Gomez, Camila Cabello, Demi Lovato, Halsey, Justin Bieber, Karol G, Girl in Red, Rosalía, Tove Lo, Ringo Starr, and Tate McRae, and contributed to several film scores.

[11] Finneas was born in Los Angeles to actress and screenwriter Maggie Baird[12] and actor Patrick O'Connell, both of whom are also musicians.

[13] He co-wrote and produced Eilish's debut EP Don't Smile at Me (2017), which peaked at number 14 on the US Billboard 200.

[22] Eilish's subsequent albums Happier Than Ever (2021) and Hit Me Hard and Soft (2024) were also co-written and produced by Finneas.

[23] He produced the 2019 single "Lose You to Love Me" by Selena Gomez,[24] which peaked at number one on the Billboard Hot 100,[25] and two tracks on the 2019 album Romance by Camila Cabello.

On October 21, Finneas released his single "Can't Wait to Be Dead" about his love-hate relationship with the Internet, along with a visual directed by Constellation Jones the following day.

[39][40] Finneas is one of twelve artists featured on Ringo Starr's 2021 EP Zoom In, contributing backing vocals to the song "Here's to the Nights".

On March 2, 2021, Finneas and Ashe released a collaboration titled "Till Forever Falls Apart", which he co-wrote and produced.

[41][42] On August 5, 2021, Finneas announced that his debut studio album Optimist would be released on October 15, 2021, through Interscope Records, and shared its lead single "A Concert Six Months from Now".

[11] In 2013, he co-starred in Life Inside Out, written by and starring his mother Maggie Baird and directed by Jill D'Agnenica.

[47] He had recurring guest roles on Modern Family and Aquarius, and played Alistair in the final season of the musical comedy-drama television series Glee in 2015.