The Oh Hellos are an American indie folk rock duo formed in 2011 in San Marcos, Texas, consisting of siblings Tyler and Maggie Heath.

[11][12] To quote the Cor Chronicle, "Just as the book follows the back-and-forth letters between two demons who plan to foil unaware Christians, many of the songs within the album poignantly describe a relationship with evil, the singer’s struggle to break free and the final triumph that will come when an unnamed hero has overcome death,".

[16] On October 28, 2022, Maggie and Tyler released a remastered version of their debut album, Through The Deep, Dark Valley, to celebrate its 10-year anniversary.

Though they write all of their music themselves, Maggie and Tyler combine their voices with a string band and choir to complete their sound.

A defining characteristic of their music is the contrast between their soft melodies and intense lyrics, creating 'a sort of tension', as The Daily Times calls it.