Len is a Canadian alternative rock group from Toronto. They are best known as a one-hit wonder for their 1999 song "Steal My Sunshine". Len was never able to repeat the success of "Steal My Sunshine", but continued to put out albums until 2003 before a nine-year hiatus.
The band consisted of siblings Marc Costanzo (vocals, guitar) and Sharon Costanzo (vocals, bass) and a revolving lineup of other musicians. During the height of their popularity, the band's lineup included Brendan Canning, later a member of the indie rock band Broken Social Scene.