Kathryn Jane Calder (born June 17, 1982) is a Canadian indie rock musician, who performs as a solo artist, and is a member of the bands The New Pornographers and Frontperson.

Calder started with The New Pornographers by filling in for Neko Case for live performances and was made a permanent member in 2006.

The movie touches on how she met Newman and her mother's death from ALS, as well as including some live performances from The New Pornographers, Immaculate Machine, and Kathryn herself as a solo artist.

[12] Calder donated her vocal talent to the end credits song from the film, A Dog Named Gucci, in the song One Voice, which also features the talents of Norah Jones, Aimee Mann, Susanna Hoffs, Lydia Loveless, Neko Case, and Brian May.

One Voice was released on Record Store Day, April 16, 2016, with profits from the sale of the single going to benefit animal charities.