The Lost Brothers are an Irish musical duo consisting of Mark McCausland and Oisin Leech, formerly of The 747s. Their first album Trails of the Lonely was released in 2008 and produced by Mike Coykendall (Bright Eyes, M Ward) and Decembrists collaborator Adam Selzer.
Leech appears on Arctic Monkeys' cover of Barbara Lewis's Baby I'm Yours, sharing lead vocals with Arctic Monkeys' Alex Turner. The song was released as a b-side on Arctic Monkeys' single Leave Before the Lights Come On.
The band appeared at the BBC Electric Proms in 2008 and played a string of festivals the following year, including Glastonbury Festival, Electric Picnic and SXSW.
In 2010 The Lost Brothers recorded their second album, So Long John Fante, in Sheffield with producer Colin Elliot with members of Richard Hawley's band backing them in the studio. The album received positive reviews in The Irish Times, Hot Press and the Irish Examiner and saw the band perform live on The Late Late Show and on BBCs The Culture Show.