The Slightlys was an Alternative Pop-Rock Band, based in Los Angeles, California.

The group was active until 2016, and was composed by Finneas O'Connell, Darius Dudley II, David Marinelli and Robby Fitzpatrick. Finneas was the band’s lead singer and one of its main songwriters as well, with most of the band’s songs written by O'Connell himself. The band split ways when a song written originally for the band by Finneas, but then sang by his sister, rising artist Billie Eilish, saw extreme popularity online, which led to him to focus mainly on producing for his sister.